Analysis and design of high-frequency multiple-output wireless power transfer system with load-independent class-E/F inverter Hanxiao Wang,Yutaro Komiyama,Xiuqin Wei ,Akihiro Konishi,Kien Nguyen1,Hiroo Sekiya international journal of circuit theory and applications., Feb. 2025. [Abstract | pdf] High-Frequency Load-Independent WPT System for Multiple-Receiver with LCC-S Compensators Akihiro Konishi; Ken Onodera; Yutaro Komiyama; Xiuqin Wei; Kien Nguyen; Hiroo Sekiya IEEJ Journal of Industry Applications, vol.14, no.1, pp.20-29, Jan. 2025. [Abstract | pdf] A Switch-Mode and Waveform Shaping Inverter With an Intrinsically Adjustable Nonlinear Output Capacitance Ali Lotfi, Mahmoud Shahbazi, Walid Issa, Patrick Wheeler, Hiroo Sekiya, and Marian K. Kazimierczuk IEEE Access, vol.12, pp.165918-165927, Nov. 2024. [Abstract | pdf] Simultaneous wireless power and data transfer system with reconfigurable load-independent class-E inverter Wenqi Zhu, Ayano Komanaka, Yutaro Komiyama, Hirotaka Koizumi, and Hiroo Sekiya IEEE Journal of Emerging and Selected Topics in Power Electronics (Early Access) doi: 10.1109/JESTPE.2024.3508093., Nov. 2024. [Abstract | pdf] Maximisation of synchronisability under low injection power Hisa-Aki Tanaka, Yoji Yabe, Somei Suga, Akira Keida, Kai Maeda, Fumito Mori, Hiroo Sekiya Europhysics Letters, no.52001, pp.1-7, June 2024. [Abstract | pdf] Maximization of Injection-Locking Ability under Low Injection Power (in Japanese) Akira Keida, Yoji Yabe, Kai Maeda, Somei Suga, Fumito Mori, Hiroo Sekiya, and Hisa-Aki Tanaka The IEICE Transactions on Fundamental of Electronics, Communications, and Computer Science (Japanese Edition), vol.J107-A, no.3, pp.47-55, May 2024. [Abstract | pdf] Analysis and Design of Load-Independent Series Resonant Power Amplifier With Constant Current Output and Its Application for WPT System Yutaro Komiyama, Ayano Komanaka, Wenqi Zhu, Akihiro Konishi, Kien Nguyen, and Hiroo Sekiya IEEE Transactions on Power Electronics, 2024., Feb. 2024. [Abstract | pdf] Load-Independent Class-E Frequency Multipliers Yinchen Xie, Wenqi Zhu, Yutaro Komiyama, Ayano Komanaka, Akihiro Konishi, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya IEEE Transactions on Circuits and Systems I: Regular Papers,DOI: 10.1109/TCSI.2024.3369649, Feb. 2024. [Abstract | pdf] Analysis and Design of High-Frequency WPT System Using Load-Independent Inverter With Robustness Against Load Variations and Coil Misalignment Yutaro Komiyama, Ayano Komanaka, Hiroaki Ota, Yuki Ito, Taichi Mishima, Takeshi Uematsu, Akihiro Konishi, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya IEEE Access, doi: 10.1109/ACCESS.2024.3361029, Jan. 2024. [Abstract | pdf] Analysis and design of class-Φ22 wireless power transfer system Weisen Luo, Xiuqin Wei, and Hiroo Sekiya IEICE Transactions on Communications, vol.106, no.12, pp.1402-1410, Dec. 2023. [Abstract | pdf] Analysis of Load-Independent ZCS Parallel-Resonant Inverter With Constant Current Wenqi Zhu, Yutaro Komiyama, Ayano Komanaka, Kien Nguyen, and Hiroo Sekiya IEEE Transactions on Industrial Electronics, doi:10.1109/TIE.2023.3333019., Nov. 2023. [Abstract | pdf] Energy-efficient VM opening algorithms for real-time workflows in heterogeneous clouds Saiqin Long, Xin Dai, Tingrui Pei,Jiasheng Cao, Hiroo Sekiya, Young-June Choi Neurocomputing, vol.483, pp.501-514, Nov. 2022. [Abstract | pdf] Design procedure of load-independent class-E WPT systems and its application in robot arm Hiroo Sekiya, Katsuki Tokano, Wenqi Zhu, Yutaro Komiyama, and Kien Nguyen IEEE Transactions on Industrial Electronics, Nov. 2022. [Abstract | pdf] CellularFlow: Memristive circuits of gyrator neurons toward brain circuits Mamoru Tanaka, Yoshifumi Nishio, Hiroo Sekiya, Masaki Bandai, Yuichi Tanji, and Yoko Uwate IEEE Journal on Emerging and Selected Topics in Circuits and Systems 2022, Nov. 2022. [Abstract | pdf] Wireless Power Transfer System with Load-Independent Inverse Class-E Oscillator Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Taichi Mishima, Yuki Ito, Takeshi Uematsu, Kien Nguyen, Hiroo Sekiya IEICE Nonlinear Theory and Its Application, vol. E13-N, no.2, pp.465-470, Apr. 2022. [Abstract | pdf] Load-independent inverse class-E ZVS inverter and its application to wireless power transfer systems Ayano Komanaka,Wenqi Zhu,Xiuqin Wei,Kien Nguyen,Hiroo Sekiya IET Power Electronics, pp.1-15, Mar. 2022. [Abstract | pdf] Generalized Analysis of Load-Independent ZCS Parallel-Resonant Inverter Ayano Komanaka, Wenqi Zhu, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya IEEE Transactions on Industrial Electronics, vol.69, no.1, pp.347-356 , Jan. 2022. [Abstract | pdf] Frequency-Modulation Controlled Load-Independent Class-E Inverter Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Taichi Mishima, Yuki Ito, Takeshi Uematsu, Kien Nguyen, Hiroo Sekiya IEEE Access, vol.9, pp.144600-144613, Nov. 2021. [Abstract | pdf] Comprehensive and Simplified Numerical Design Procedure for Class-E Switching　Circuits Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya IEEE Access, Oct. 2021. [Abstract | pdf] Analysis and Design of 6.78 MHz Wireless Power Transfer System for Robot Arm Katsuki Tokano, Wenqi Zhu, Tatsuki Osato, Kien Nguyen, Hiroo Sekiya IEICE Transactions on Communications, pp.1-10, Sept. 2021. [Abstract | pdf] A novel design methodology for extended continuous class-F power amplifiers in wireless applications Sepehr Zarghami, Mohsen Hayati, Marian K. Kazimierczuk, and Hiroo Sekiya Wireless Networks, vol.27, pp.3947-3968, Aug. 2021. [Abstract | pdf] High-Frequency Single-Switch PFC with Frequency-Modulation Controlled Class-E2 Converter Wenqi Zhu, Takayuki Ikari, Giorgio Lovison, Keisuke Inoue, Shigeharu Yamagami, and Hiroo Sekiya IET Power Electronics, pp.1-11, June 2021. [Abstract | pdf] Early wake-up ahead node for fast code dissemination in wireless sensor networks Qingyong Deng, Yan Ouyang, Shujuan Tian, Rong Ran, Jinsong Gui, and Hiroo Sekiya IEEE Transactions on Vehicular Technology, vol.70, no.4, Apr. 2021. [Abstract | pdf] Analysis and Design of Load-Independent Class-E Synchronous Rectifier  (in Japanese) Tatsuki OSATO, Asiya, Xiuqin WEI, Wenqi ZHU, Kien NGUYEN, and Hiroo, and SEKIYA , vol.J104-B, no.2, pp.83-92, Feb. 2021. [Abstract | pdf] Continuous class-F power amplifier using quasi-elliptic low-pass filtering matching network Sepehr Zarghami, Mohsen Hayati, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Circuits and Systems II: Express Briefs, vol.67, no.11, pp.2407-2411, Nov. 2020. [Abstract | pdf] Design of class-E_M amplifier with consideration of parasitic non-linear capacitances and on-state resistance Hamed Abbasi, Mohsen Hayati, Marian K. Kazimierczuk, and Hiroo Sekiya IET Power Electronics, vol.13, no.14, Nov. 2020. [Abstract | pdf] An automated design procedure for class-E amplifier Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE, vol.11, no.4, pp.527-545, Oct. 2020. [Abstract | pdf] Generalized Analysis and performance investigation of the class-E/Fn rectifiers Asiya, Xiuqin Wei, Jingyue Ma, Tatsuki Osato, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya IEEE Access, vol.8, pp.124145-124157, June 2020. [Abstract | pdf] Steady-state analysis and design of phase-controlled class-D ZVS inverter Tatsuki Osato, Xiuqin Wei, Asiya, Kien Nguyen, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE, vol.11, no.2, pp.189-205, Apr. 2020. [Abstract | pdf] Analysis and design of generalized class-E rectifier Asiya, Tatsuki Osato, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE, vol.11, no.2, pp.206-223, Apr. 2020. [Abstract | pdf] Design of load-independent class-E inverter with MOSFET gate-to-drain and drain-to-source parasitic capacitances Weisen Luo, Yusuke Ogi, Fumiya Ebihara, Xiuqin Wei, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE, pp.267-277, Apr. 2020. [Abstract | pdf] Novel design of soft-switching resonant converter with performance visualization algorithm Shohei Saito, Shohei Mita, Wenqi Zhu, Hiroyuki Onishi, Shingo Nagaoka,Takeshi Uematsu, Kien Nguyen, and Hiroo Sekiya IEEE Access, vol.8, pp.59922-59933, Mar. 2020. [Abstract | pdf] Locking range maximization in injection-locked class-E oscillator -A case study for optimizing synchronizability Yoji Yabe, Hisa-Aki Tanaka, Hiroo Sekiya, Masaki Nakagawa, Fumito Mori, Kensuke Utsunomiya, and Akira Keida IEEE Transactions on Circuits and Systems I: Regular Papers 2020, vol.67, no.5, pp.1762-1774, Mar. 2020. [Abstract | pdf] Analysis and Design of Generalized Class-E/F2 and Class-E/F3 Inverters Jingyue Ma, Asiya, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya IEEE Access, vol.8, pp.61277-61288, Mar. 2020. [Abstract | pdf] Steady-state analysis of class-E shunt inductor inverter outside ZCS and ZDCS conditions Ali Lotfi, Akihiko Katsuki, Fujio Kurokawa, Hiroo Sekiya, Marian K. Kazimierczuk, and Frede Blaabjerg IEEE Transactions on Components, Packaging and Manufacturing Technology, vol.9, no.8, pp.1587-1594, Aug. 2019. [Abstract | pdf] Analysis of class-DE PA using MOSFET devices with non-equally grading coefficient Ali Lotfi, Akihiko Katsuki, Fujio Kurokawa, Hiroo Sekiya, Marian K. Kazimierczuk, and Frede Blaabjerg IEEE Transactions on Circuits and Systems I: Regular Papers, vol.66, no.7, pp.2794-2802, Mar. 2019. [Abstract | pdf] Analysis and study of the duty ratio effects on the class-E_M power amplifier including MOSFET nonlinear gate-to-drain and drain-to-source capacitances Mohsen Hayati, Hamed Abbasi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.33, no.12, pp.10500-10562, Dec. 2018. [Abstract | pdf]  (in Japanese) , vol.J101-A, no.10, pp.250-259, Oct. 2018. [Abstract | pdf] Subnominal operation of class-E nonlinear shunt capacitance power amplifier at any duty ratio and grading coefficient Ali Lotfi, Ali Medi, Akihiko Katsuki, Fujio Kurokawa, Hiroo Sekiya, Marian K. Kazimierczuk, and Tadashi Suetsugu IEEE Transactions on Industrial Electronics, vol.65, no.10, Oct. 2018. [Abstract | pdf] High-frequency resonant gate driever with isolated class-E amplifier Ryoko Sugano, Yuchong Sun, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE, vol.9, no.3, pp.358-373, July 2018. [Abstract | pdf] Design of class E power amplifier with new structure and flat top switch voltage waveform Mohsen Hayati, Sobhan Roshani, Saeed Roshani, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.33, no.3, pp.2571-2579, Mar. 2018. [Abstract | pdf] Outside nominal operation analysis and design considerations of Inverse-class-E power amplifier Ali Lotfi, Ali Ershadi, Ali Medi, Mohsen Hayati, Marian K. Kazimierczuk, Hiroo Sekiya, Akihiko Katsuki, and Fujio Kurokawa IEEE Journal of Emerging and Selected Topics in Power Electronics, vol.6, no.1, pp.165-174, 2018. [Abstract | pdf] Steady-state analysis of isolated class-E2 converter outside nominal operation Tomoharu Nagashima, Xiuqin Wei, Elisenda Bou, Eduard Alarcon, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Industrial Electronics, vol.64, no.4, pp.3227-3238, Apr. 2017. [Abstract | pdf] Power-flow simulator with visualization function based on IEEE common data format Shohei Sugino and Hiroo Sekiya Journal of Multimedia and Information System, vol.3, no.4, pp.161-168, Dec. 2016. [Abstract | pdf] A class E power amplifier design considering MOSFET nonlinear drain-to-source and nonlinear gate-to-drain capacitances at any grading coefficient Mohsen Hayati, Sobhan Roshani, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.31, no.11, pp.7770-7779, Nov. 2016. [Abstract | pdf] Input signal waveforms for maximal injection-locking range -An application to CMOS ring oscillators- (in Japanese) Yoji Yabe, Isao Nishikawa, Kazuki Nakada, Tomoyuki Morikawa, Hiroo Sekiya, Yoshiaki Ando, and Hisa-Aki Tanaka , vol.J99-C, no.6, pp.298-313, June 2016. [Abstract | pdf] Analysis and design of class E power amplifier considering MOSFET parasitic input and output capacitances Mohsen Hayati, Sobhan Roshani, Marian Kazimierczuk, and Hiroo Sekiya IET Circuits, Devices & Systems, vol.10, pp.433-440, Apr. 2016. [Abstract | pdf] Steady-state analysis and design of class-D ZVS inverter at any duty ratio Xiuqin Wei, Hiroo Sekiya, Tomoharu Nagashima, Marian K. Kazimierczuk, and Tadashi Suetsugu IEEE Transactions on Power Electronics, vol.31, no.1, pp.394-405, Jan. 2016. [Abstract | pdf] Orthogonal-Gradient Measurement Matrix Construction Algorithm Tian Shujuan, Fan Xiaoping, Li Zhetao, Pan Tian, Choi Youngjune, and Hiroo Sekiya Chinese Journal of Electronics, vol.25, no.1, pp.81-87, Jan. 2016. [Abstract | pdf] Analysis and design of loosely inductive coupled wireless power transfer system based on class-E^2 DC-DC converter for efficiency enhancement Tomoharu Nagashima, Xiuqin Wei, Elisenda Bou, Eduard Alarcon, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.62, no.11, pp.2781-2791, Nov. 2015. [Abstract | pdf] Steady-state analysis and design of class-DE inverter at any duty ratio Hiroo Sekiya, Xiuqin Wei, Tomoharu Nagashima, and Marian K. Kazimierczuk IEEE Transactions on Power Electronics, vol.30, no.7, pp.3685-3694, July 2015. [Abstract | pdf] Design of a DC-DC converter with phase-controlled class-D ZVS invertrer Yuta Yamada, Tomoharu Nagashima, Yoshifumi Ibuki, Yoshiki Fukumoto, Tatsuya Ikenari, and Hiroo Sekiya IEEE Journal on Emerging and Selected Topics in Circuits and Systems(JETCAS), pp.354-363, July 2015. [Abstract | pdf] Generalized design considerations and analysis of class-E amplifier for sinusoidal and square input voltage waveform Mohsen Hayati, Ali Lotfi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Industrial Electronics, vol.62, no.1, pp.211-220, Jan. 2015. [Abstract | pdf] Locking range derivations for injection-locked class-E oscillator applying phase reduction theory Tomoharu Nagashima, Xiuqin Wei, Hisa-Aki Tanaka, and Hiroo Sekiya IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.61, no.10, pp.2904-2911, Oct. 2014. [Abstract | pdf] Analysis, Design and Implementation of Class-E ZVS Power Amplifier with MOSFET Nonlinear Drain-to-Source Parasitic Capacitance at Any Grading Coefficient Mohsen Hayati, Ali Lotfi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.29, no.9, pp.4989-4999, Sept. 2014. [Abstract | pdf] Waveform equations, output power, and power conversion efficiency for class-E inverter outside nominal operation Tomoharu Nagashima, Xiuqin Wei, Tadashi Suetsugu, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Industrial Electronics, vol.61, no.4, pp.1799-1810, Apr. 2014. [Abstract | pdf] Modeling and analysis of class-E amplifier with a shunt inductor at sub-nominal operation for any duty ratio Mohsen Hayati, Ali Lotfi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.61, no.4, pp.987-1000, Apr. 2014. [Abstract | pdf] Analysis and design of class-E_M power amplifier Xiuqin Wei, Tomoharu Nagashima, Marian K. Kazimierczuk, Hiroo Sekiya, and Tadashi Suetsugu IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.61, no.4, pp.976-986, Apr. 2014. [Abstract | pdf] Analysis and design of class-E power amplifier with MOSFET parasitic linear and nonlinear capacitances at any duty ratio Mohsen Hayati, Ali Lotfi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.28, no.11, pp.5222-5232, Nov. 2013. [Abstract | pdf] Performance study of class-E power amplifier with a shunt inductor at subnominal conditios Mohsen Hayati, Ali Lotfi, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Power Electronics, vol.28, no.8, pp.3834-3844, Aug. 2013. [Abstract | pdf] Particle swarm optimization for design of class-E amplifier Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya Nonlinear Theory and Its Applications, IEICE Journal, vol.3, no.4, pp.586-595, Oct. 2012. [Abstract | pdf] Design of class-E_M oscillator with second harmonic injection Ryosuke Miyahara, Xiuqin Wei, Tomoharu Nagashima, Takuji Kousaka, and Hiroo Sekiya IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.59, no.10, pp.2456-2467, Oct. 2012. [Abstract | pdf] Push-pull class-E_M power amplifier for low harmonic-contents and high output-power applications Xiuqin Wei, Shingo Kuroiwa, Tomoharu Nagashima, Marian K. Kazimierczuk, and Hiroo Sekiya IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.59, no.9, pp.2137-2146 , Sept. 2012. [Abstract | pdf] Steady-state behavior of class-E amplifier outside nominal operation taking into account MOSFET-body-diode effect Tomoharu Nagashima and Hiroo Sekiya Journal of Signal Prosessing, vol.16, no.4, July 2012. [Abstract | pdf] Bifurcation analysis of the class-E inverter for switching-pattern derivations Tomoharu Nagashima, XiuqinWei, Takuji Kousaka, and Hiroo Sekiya IEICE Communications Express (ComEx), vol.1, no.1, pp.33-39, June 2012. [Abstract | pdf] Design of class-E amplifier with MOSFET linear gate-to-drain and nonlinear drain-to-source capacitances Xiuqin Wei, Hiroo Sekiya, Shingo Kuroiwa, Tadashi Suetsugu, and Marian K. Kazimierczuk IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.58, no.10, pp.2556-2565, Oct. 2011. [Abstract | pdf] Novel design procedure for Class-E_M power amplifiers Ryosuke Miyahara, Hiroo Sekiya, and Marian K. Kazimierczuk IEEE Transactions on Microwave Theory and Technique, vol.58, no.12, pp.3607-3616, Dec. 2010. [Abstract | pdf] Analysis of class-DE amplifier with linear and nonlinear shunt capacitances at 25% duty ratio Hiroo Sekiya, Natsumi Sagawa, and Marian K. Kazimierczuk IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.57, no.9, pp.2334-2342, Sept. 2010. [Abstract | pdf] Analysis of class DE amplifier with nonlinear shunt capacitances at any grading coefficient for high Q and 25 % duty ratio Hiroo Sekiya, Natsumi Sagawa, and Marian K. Kazimierczuk IEEE Transactions on Power Electronics, vol.25, no.4, pp.924-932, Apr. 2010. [Abstract | pdf] Analysis and design of class DE amplifier with nonlinear shunt capacitances Hiroo Sekiya, Takayuki Watanabe, Tadashi Suetsugu, and Marian K. Kazimierczuk IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.56, no.10, pp.2362-2371, Oct. 2009. [Abstract | pdf] Design procedure for class E switching circuits allowing implicit circuit equations Hiroo Sekiya, Tooru Ezawa, and Yuichi Tanji IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.55, no.11, pp.3688-3696, Dec. 2008. [Abstract | pdf] Design of class DE amplifier with nonlinear shunt capacitances for any output Q Toru Ezawa, Hiroo Sekiya, and Takashi Yahagi IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol.E91-A, no.4, pp.927-934, Apr. 2008. [Abstract | pdf] Novel design procedure for class DE amplifier Hiroo Sekiya, Satoki Oshikawa, Jianming Lu, and Takashi Yahagi Journal of Circuits, Systems, and Computers, vol.17, no.2, pp.191-209, Apr. 2008. [Abstract | pdf] Design of class DE inverter with second order constant K band-pass filter Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Trans. on Fundamentals of Electronics, Communications and Computer Sciences, vol.E90-A, no.10, pp.2132-2140, Oct. 2007. [Abstract | pdf] Resonant dc/dc converter with class E oscillator Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, Takashi Yahagi IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.53, no.9, pp.2025 - 2035, Sept. 2006. [Abstract | pdf] Steady-state behavior of class DE amplifier under non optimum?@conditions Takahiro Negishi, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi Journal of Signal Processing, vol.10, no.4, pp.247-250, July 2006. [Abstract | pdf] Investigation of class E amplifier with nonlinear capacitance for any output Q and finite dc-feed inductance Hiroo Sekiya, Yoji Arifuku, Hiroyuki Hase, Jianming Lu, and Takashi Yahagi IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol.E89–A, no.4, pp.873-881, Apr. 2006. [Abstract | pdf] Phase control for resonant dc/dc converter with class DE inverter and class E rectifier Hiroo Sekiya, Shuichi Nemoto, Jianming Lu, and Takashi Yahagi IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.53, no.1, pp.254-263, Feb. 2006. [Abstract | pdf] Design of phase-controlled class E inverter with asymmetric circuit configuration Daisuke Kawamoto, Hiroo Sekiya, Hirotaka Koizumi, Iwao Sasase, and Shinsaku Mori IEEE Transactions on Circuits and Systems Part II: express Briefs, vol.51, no.10, pp.523-528, Oct. 2004. [Abstract | pdf] Novel design procedure for MOSFET class E oscillator Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol.E87-A, no.9, pp.2241-2247, Sept. 2004. [Abstract | pdf] FM/PWM control scheme in class DE inverter Hiroo Sekiya, Hirotaka Koizumi, Shinsaku Mori, Iwao Sasase, Jianming Lu, and Takashi Yahagi IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.51, no.7, pp.1250-1260, July 2004. [Abstract | pdf] Exact analysis of class DE amplifier with FM and PWM control Hiroo Sekiya, Shinsaku Mori, and Iwao Sasase IEICE Trans. on Coomunications, vol.E86-B, no.10, pp.3082-3093, Oct. 2003. [Abstract | pdf] Design of generalized class E^2 dc/dc converter Hiroo Sekiya, Jianming Lu, and Takashi Yahagi International Journal of Circuit Theory and Applications, vol.31, no.3, pp.229-248, Aug. 2003. [Abstract | pdf] Computation of design values for Class E amplifiers without using waveform equations Hiroo Sekiya, Iwao Sasase, and Shinsaku Mori IEEE Transactions on Circuits and Systems Part I: Fundamental Theory and Applications, vol.49, no.7, pp.966-978, July 2002. [Abstract | pdf] Resonant dc/dc converter with class DE inverter and class E rectifier using thinned-out method (deleting some of pulses to the rectifier) Hirotaka Koizumi, Hiroo Sekiya, Mitsuhiro Matsuo, Shinsaku Mori, and Iwao Sasase IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.48, no.1, pp.123-126, Jan. 2001. [Abstract | pdf] New control scheme for class DE inverter by varying driving signals Hiroo Sekiya, Mitsuhiro Matsuo, Hirotaka Koizumi, Shinsaku Mori, and Iwao Sasase, IEEE Transactions on Industrial Electronics, vol.47, no.6, pp.1237-1247, Dec. 2000. [Abstract | pdf] Design of a high-efficiency class DE tuned power oscillator Mitsuhiro Matsuo, Hiroo Sekiya, Tadashi Suetsugu, Kokichi Shinoda, and Shinsaku Mori IEEE Transactions on Circuits and Systems Part I: Fundamental Theory and Applications, vol.47, no.11, pp.1645-1649, Nov. 2000. [Abstract | pdf]

Analysis and Design of Capacitive Coupling Wireless Power Transfer System Using Load-Independent Class-EF Inverter Takumi Kobayashi, Yutaro Komiyama, Akihiro Konishi, Hiroaki Ota, Yuki Ito, Taichi Mishima, Takeshi Uematsu, Kien Nguyen, Hiroo Sekiya IEEE Applied Power Electronics Conference (APEC2025), Mar. 2025. [Abstract | pdf] Design of Capacitive Power Transfer System Takumi Kobayashi, Yutaro Komiyama, Akihiro Konishi, Kien Nguyen, Hiroo Sekiya IEEE Workshop on Nonlinear Circuit Networks (NCN2024), pp.46-49, Dec. 2024. [Abstract | pdf] Design of magnetic resonant WPT systems Naoki Fukuda, Yutaro Komiyama, Yinchen Xie, Ayano Komanaka, Akihiro Konishi, Kien Nguyen, and Hiroo Sekiya IEEE Workshop on Nonlinear Circuit Networks (NCN2024), pp.50-52, Dec. 2024. [Abstract | pdf] Design of Dual-Frequency Rectifier in Wireless Power Transfer Systems Yinchen Xie; Yutaro Komiyama; Ayano Komanaka; Akihiro Konishi; Kien Nguyen; Hiroo Sekiya 2024 13th International Conference on Renewable Energy Research and Applications (ICRERA), Dec. 2024. [Abstract | pdf] Design of Load-Independent Class-Φ3 Resonant Inverter Yutaro Komiyama, Wenqi Zhu, Akihiro Konishi, Kien Nguyen, and Hiroo Sekiya IEEE Energy Conversion Congress and Exposition (ECCE), Oct. 2024. [Abstract | pdf] Design of Resonant Converter with Genetic-Algorithm Optimization Rintaro Kaneiso, Ayano Komanaka, Yinchen Xie, Yutaro Komiyama, Akihiro Konishi, Kien Nguyen, and Hiroo Sekiya 21st International SoC Design Conference (ISOCC 2024), Aug. 2024. [Abstract | pdf] Design of Class-Φ3 Power Oscillator Yutaro Komiyama, Wenqi Zhu, Akihiro Konishi, Nguyen Kien, and Hiroo Sekiya 2024 IEEE International Symposium on Circuits and Systems (ISCAS2024), May 2024. [Abstract | pdf] Resonant Converter with Class-E^−1 inverter with Constant Voltage Ayano Komanaka, Wenqi Zhu, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya 2024 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing(NCSP2024), pp.441-444, Mar. 2024. [Abstract | pdf] Load-Independent High-Frequency WPT System for Multiple Receivers With Single Transmitter Hanxiao Wang, Yutaro Komiyama,Xiuqin Wei, Akihiro Konishi,Kien Nguyen, and Hiroo Sekiya The 49th Annual Conference of the IEEE Industrial Electronics Society (IECON 2023), Oct. 2023. [Abstract | pdf] Reconfigurable Class-E/EF Load-independent Inverter with CC-CV Output, W. Zhu, A. Komanaka, Y. Komiyama, X. Wei, K. Nguyen, and H. Sekiya IEEE Energy Convers. Congr. Expo. (ECCE), pp.2307-2312, Oct. 2023. [Abstract | pdf] Simple Applications of WiBIC with Asynchronous Pulse Code Multiple Access Jiaying Lin, Ryuji Nagasawa, Kien Nguyen† , Hiroyuki Torikai, Mikio Hasegawa,Won-Joo Hwang and Hiroo Sekiya IEICE Proceedings Series,, vol.76, no.B2L-24, Sept. 2023. [Abstract | pdf] Design of High-Frequency CC/CV Output Load- Independent WPT System Jiaxin Yan, Wenqi Zhu, Akihiro Konishi,Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya 12th INTERNATIONAL CONFERENCE ON RENEWABLE ENERGY RESEARCH AND APPLICATIONS(ICRERA), Aug. 2023. [Abstract | pdf] Load-Independent Multiple Output WPT System With Fixed Coupling Coils Akihiro Konishi, Ken Onodera, Yutaro Komiyama, Xiuqin Wei, Kien Nguyen, Hiroo Sekiya The 20th International SoC Conference (ISOCC 2023), Aug. 2023. [Abstract | pdf] Design and Construction of Indoor People Number Estimation System Ryuji Nagazawa, Jiaying Lin, Kien Nguyen, Hiroo Sekiya, Won-Joo Hwang, Hiroyuki Torikai ISSN 1975-4736 MITA2023, July 2023. [Abstract | pdf] Self-Tuned Series Resonant Power Oscillator with Load-independent Operation Yutaro Komiyama, Wenqi Zhu, Ayano Komanaka, Xiuqin Wei, Nguyen Kien, and Hiroo Sekiya 2023 IEEE International Symposium on Circuits and Systems (ISCAS2023), pp.1-5, May 2023. [Abstract | pdf] Simulator-Based Optimization Software for High-Frequency Power-Electronics Circuits Yuichi Hirama, Ayano Komanaka, Yutaro Komiyama, Wenqi Zhu, Kien Nguyen, Xiuqin Wei, Hiroo Sekiya 2023 IEEE International Symposium on Circuits and Systems (ISCAS2023), pp.1-5, May 2023. [Abstract | pdf] Wireless Power Transfer System with Series Resonant Inverse Class-E Inverter Yutaro Komiyama, Wenqi Zhu, Wei Xiuqin, Kien Nguyen, and Hiroo Sekiya 2023 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'23), pp.194-197, Mar. 2023. [Abstract | pdf] Load-Independent Constant-Current/Zero-Current Switching Inverter with Series Resonant Filter Yutaro Komiyama, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya 2023 IEEE Applied Power Electronics Conference and Exposition, pp.490-494, Mar. 2023. [Abstract | pdf] Analysis and Design of Push-pull Load-independent Class-E Frequency Tripler Yinchen Xie, Wenqi Zhu,Yutaro Komiyama, Kien Nguyen, and Hiroo Sekiya 2023 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'23),, Mar. 2023. [Abstract | pdf] Achievement of CV and CC Output Modes on Class-E/F Inverter with One Auxiliary Switch Wenqi Zhu, Yutaro Komiyama, Kien Nguyen, and Hiroo Sekiya 2022 IEEE International Symposium on Circuits and Systems (ISCAS, pp.2635-2639, Dec. 2022. [Abstract | pdf] Design of Class-E Frequency Doubler Corresponding to Load Variations in Large Ranges Yinchen Xie, Wenqi Zhu, Yutaro Komiyama, Kien Nguyen, and Hiroo Sekiya IEEE Workshop on Nonlinear Circuits Networks (NCN2022), Dec. 2022. [Abstract | pdf] Development of robotic system without wired connections at joints by wireless communication and wireless power transfer Kazunobu Serizawa, Satoru Shimizu, Hiroo Sekiya, and Masataka Ohira 2022 IEEE 33rd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), pp.01-07, Sept. 2022. [Abstract | pdf] Constant Voltage Output Autonomous Wireless Power Transfer System Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, Takeshi Uematsu, Yuki Ito, Taichi Mishima, and Hiroo Sekiya 2021 IEEE Workshop on Nonlinear Circuit Networks (NCN2021), pp.21-24, Dec. 2021. [Abstract | pdf] Wireless Power Transfer System with Load-Independent Inverse Class-E Oscillator Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, Takeshi Uematsu, Yuki Ito, Taichi Mishima, and Hiroo Sekiya The 2021 Nonlinear Science Workshop (NLSW2021), p.39, Dec. 2021. [Abstract | pdf] Load-Independent Inverse Class-E Oscillator with Armstrong-Oscillator Based Topology Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya The 18th International SoC Design Conference (ISOCC 2021), pp.175-176, Oct. 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya IEEE Annual Energy Conversion Congress and Exposition (ECCE2021), Oct. 2021. [Abstract | pdf] PSO-based Design Procedure for Class-DE Inverter Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya 18th International SoC Design Conference (ISOCC 2021), Oct. 2021. [Abstract | pdf] Class-E Inverter with Frequency Modulation Control Yutaro Komiyama, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya The 10th International Conference on Renewable Energy Research and Applications (ICRERA 2021), pp.94-98, Sept. 2021. [Abstract | pdf] Load Independent Class-E-1 Inverter with Shunt Capacitance Ayano Komanaka, Wenqi Zhu, Kien Nguyen, Hiroo Sekiya, and Xiuqin Wei ISIE2021, June 2021. [Abstract | pdf] Optimal Design of 6.78 MHz Wireless Power Transfer System for Robot Arm Katsuki Tokano, Wenqi Zhu, Tatsuki Osato, Kien Nguyen, Hiroo Sekiya International Symposium on Circuits and Systems, May 2021. [Abstract | pdf] Analysis and Design of Load-Independent ZCS Parallel-Resonant Inverter Ayano Komanaka, Wenqi Zhu, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.309-312, Mar. 2021. [Abstract | pdf] Implementation of Micropayment System Using IoT Devices Ryota Nakada, Kien Nguyen, and Hiroo Sekiya RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.178-181, Mar. 2021. [Abstract | pdf] Experimental Evaluations of Inverse Class-E Inverter Ayano Komanaka, Wenqi Zhu, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya 2020 IEEE Workshop on Nonlinear Circuit Networks(NCN2020), Dec. 2020. [Abstract | pdf] Analysis and Experimental Verification of Parallel Resonant Oscillator Shuya Matsuhashi,Kien Nguyen, and Hiroo Sekiya 2020 IEEE Workshop on Nonlinear Circuit Networks(NCN2020), Dec. 2020. [Abstract | pdf] Analysis of Multi-hop Wireless Power Transfer System Katsuki Tokano, Wenqi Zhu, Tatsuki Osato, Kien Nguyen, and Hiroo Sekiya 2020 IEEE Workshop on Nonlinear Circuit Networks(NCN2020), Dec. 2020. [Abstract | pdf] Highly Accelerated Optimization Method for Wireless Power Transfer System W. Zhu, K. Nguyen, and H. Sekiya 2020 IEEE Workshop on Nonlinear Circuit Networks(NCN2020), Dec. 2020. [Abstract | pdf] Design of class-Phi3 Inverter Hiroo Sekiya, Jingyue Ma, and Kien Nguyen 17th International SoC Design Conference (ISOCC2020), Oct. 2020. [Abstract | pdf] Load-independent self-tuned parallel resonant power oscillator Shuya Matsuhashi, Yoshiro Hara,Kien Nguyen, Takeshi Uematsu, Shingo Nagaoka, Taichi Mishima, and Hiroo Sekiya The Eleventh Annual Energy Conversion Congress and Exposition (ECCE2019), Detroit, MI, USA, pp.1571-1576, Oct. 2020. [Abstract | pdf] A 1MHz Class-E2 Single-Stage PFC Converter with Frequency Control Wenqi Zhu and Hiroo Sekiya 2020 IEEE Applied Power Electronics Conference and Exposition ( APEC), Mar. 2020. [Abstract | pdf] Evaluation of Load Variations Characteristic in Class-F Amplifier Yuki Oue, Kien Nguyen, and Hiroo Sekiya 2019 IEEE Workshop on Nonlinear Circuit Networks, Dec. 2019. [Abstract | pdf] A 1MHz Class-E2 Single-Stage Power Factor Correction Converter with Frequency Control Wenqi Zhu, Kien Nguyen and Hiroo Sekiya 2019 IEEE Workshop on Nonlinear Circuit Networks, Dec. 2019. [Abstract | pdf] Analysis of Class-E Rectifier with Low Output-Filter Inductance Asiya, Tatsuki Osato, Kien Nguyen, Hiroo Sekiya, and Xiuqin Wei 8TH INTERNATIONAL CONFERENCE ON RENEWABLE ENERGY RESEARCH AND APPLICATIONS, Nov. 2019. [Abstract | pdf] Design of 6.78 MHz SiC MOSFET class-E inverter with a class-phi high-speed driver Haruma Yogi, Xiuqin Wei, Hiroo Sekiya, and Takashi Hikihara The Eleventh Annual Energy Conversion Congress and Exposition (ECCE2019), Baltimore, MD, USA, pp.375-379, Oct. 2019. [Abstract | pdf] A novel circuit topology and its design for class-E^2 DC-DC converter Yusuke Ogi, Fumiya Ebihara, Xiuqin Wei, and Hiroo Sekiya The Eleventh Annual Energy Conversion Congress and Exposition (ECCE2019), Baltimore, MD, USA, pp.1256-1260, Oct. 2019. [Abstract | pdf] Load independent parallel resonant inverter H. Sekiya, Y. Ozawa and X. Wei 16th International SoC Design Conference (ISOCC2019), pp.148-149, Oct. 2019. [Abstract | pdf] Analysis of load-independent class-E inverter at any duty ratio Natsumi Obinata, Weisen Luo, Xiuqin Wei, and Hiroo Sekiya The 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), pp.1615-1620, Oct. 2019. [Abstract | pdf] Design of load-independent class-E inverter with MOSFET parasitic capacitances Weisen Luo, Xiuqin Wei, Hiroo Sekiya, and Tadashi Suetsugu 62nd IEEE International Midwest Symposium on Circuits and Systems (MWSCAS2019)), Dallas, TX, USA, Aug. 2019. [Abstract | pdf] Frequency-controlled resonant converter with push-pull Class-E inverter Shohei Saito, Shohei Mita, Hiroyuki Onishi, Shingo Nagaoka, Takeshi Uematsu, and Hiroo Sekiya 2019 IEEE Applied Power Electronics Conference and Exposition (APEC2019), Mar. 2019. [Abstract | pdf] Experimental evaluations of thinned-out and PDM controlled class-D rectifier Shengzhe Xu, Akane Iwasaki, and Hiroo Sekiya 2018 International Conference on Smart Grids (ICSG 2018), pp.76-81, Dec. 2018. [Abstract | pdf] Analysis and design of phase-controlled class-D ZVS inverter Tatsuki Ohsato, Yuta Yamada, Xiuqin Wei, and Hiroo Sekiya 2018 International SoC Design Conference (ISOCC2018), pp.160-161, Nov. 2018. [Abstract | pdf] Pre- and post-regulation control of high-frequency magnetic-resonance wireless power transfer system with class-D rectifier Yoshiro Hara, Tatsuki Ohsato, and Hiroo Sekiya 2018 IEEE International Communications Energy Conference (INTELEC2018), pp.1-6, Oct. 2018. [Abstract | pdf] The phase-controlled class-D ZVS inverter with clamp diodes Yusuke Ishihara, Shohei Mita, and Hiroo Sekiya 2018 IEEE Energy Conversion Congress and Exposition (ECCE2018), pp.6745-6750, Sept. 2018. [Abstract | pdf] High-frequency soft-switching resonant driver for SiC class-D amplifier Ryoko Sugano, Xiuqin Wei, and Hiroo Sekiya 2018 International Symposium on Nonlinear Theory and Its Application (NOLTA2018), Sept. 2018. [Abstract | pdf] Analysis of class-D ZVS inverter with asymmetrical duty-cycle control for wireless power transfer applications Shohei Mita, Hiroo Sekiya 2018 IEEE International Symposium on Circuits and Systems (ISCAS2018), pp.1-5, May 2018. [Abstract | pdf] Analysis and design of wireless power transfer system with asymmetrical duty-cycle controlled class-D ZVS inverter Shohei Mita, Hiroo Sekiya 2018 IEEE International Symposium on Circuits and Systems (ISCAS2018), pp.1-5, May 2018. [Abstract | pdf] A novel analysis procedure for class E oscillator Fumiya Ebihara, Xiuqin Wei, Hiroo Sekiya, and Tadashi Suetsugu 2018 IEEE International Symposium on Circuits and Systems (ISCAS2018), pp.1-5, May 2018. [Abstract | pdf] Design of phase-controlled class-D ZVS inverter for output power regulation Yudai Nagata, Hiroo Sekiya 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'18), Mar. 2018. [Abstract | pdf] Analysis procedure of further miniaturized class-E2 DC/DC converter Yuusuke Ogi, Xiuqin Wei, Hiroo Sekiya, and Tadashi Suetsugu 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'18), Mar. 2018. [Abstract | pdf] Steady-state analytical expression of voltage shift in resonant drivers with clamp diode Hanako Matsubara, Xiuqin Wei, and Hiroo Sekiyay 2017 International Symposium on Nonlinear Theory and Its Application (NOLTA2017), Dec. 2017. [Abstract | pdf] The Phase-controlled class-D ZVS inverter with current protection Yudai Nagata, Yoshiki Fukumoto, Tatsuya Ikenari, Hiroo Sekiya 2017 IEEE Energy Conversion Congress and Exposition (ECCE2017), pp.2176-2183, Oct. 2017. [Abstract | pdf] Implementation and evaluation of pre- and post-regulation control with class-E^2 wireless power transfer system Yuta Ozawa, Hiroo Sekiya 2017 IEEE International Telecommunications Energy Conference (INTELEC2017), pp.369-375, Oct. 2017. [Abstract | pdf] A flyback converter using power-MOSFETs to achieve high frequency operation beyond 10 MHz Tatsuki Ohsato, Nobuo Satoh, and Hiroo Sekiya 2017 International Future Energy Electronics Conference (IFEEC2017), no.1101-1105, June 2017. [Abstract | pdf] Proposal and analysis of Class-E/F3 rectifier Takumi Murayama, Xiuqin Wei, and Hiroo Sekiya 2017 International Future Energy Electronics Conference (IFEEC2017), pp.175-179, June 2017. [Abstract | pdf] Design of wireless power transfer system with class E inverter and half-bridge class DE rectifier at any fixed coupling coefficient Tsuyoshi Inaba, Hiroo Sekiya, Hirotaka Koizumi 2017 International Future Energy Electronics Conference (IFEEC2017), pp.185-189, June 2017. [Abstract | pdf] High-speed driver for SiC MOSFET based on class-E inverter Yuchong Sun, Ryoko Sugano, Xiuqin Wei, Takashi Hikihara, and Hiroo Sekiya 2017 IEEE International Symposium on Circuits and Systems(ISCAS2017), pp.1-4, May 2017. [Abstract | pdf] Review of tuned power oscillators Hiroo Sekiya 2016 International Symposium on Nonlinear Theory and Its Application (NOLTA2016), pp.582-585, Nov. 2016. [Abstract | pdf] Design example of SiC isolated soft-switching driver Ryoko Sugano, Yuchong Sun, Hiroo Sekiya, Takashi Hikihara 2016 International Symposium on Nonlinear Theory and Its Application (NOLTA2016), Nov. 2016. [Abstract | pdf] A design example of class-E based gate driver for high frequency operation of SiC power MOSFET Michihiro Shintani, Yuchong Sun, Hiroo Sekiya, and Takashi Sato 2016 International Symposium on Nonlinear Theory and Its Application (NOLTA2016), p.181, Nov. 2016. [Abstract | pdf] Experimental evaluations of thinned-out and PDM controlled class-E rectifier Akane Iwasaki, Tomoharu Nagashima, and Hiroo Sekiya 2016 IEEE Energy Conversion Congress and Exposition (ECCE2016), Sept. 2016. [Abstract | pdf] Design procedure for wireless power transfer system with inductive coupling-coil optimizations using PSO Takumi Noda, Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya 2016 IEEE International Symposium on Circuits and Systems (ISCAS2016), pp.646-649, May 2016. [Abstract | pdf] Analytical expression of phase-controlled class-D inverter at any duty ratio Yuta Yamada, Tomoharu Nagashima, and Hiroo Sekiya 2016 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'16), pp.383-386, Mar. 2016. [Abstract | pdf] Resonant converter designs applying computation algorithms of bifurcation values Yuta Yamada, Tomoharu Nagashima, and Hiroo Sekiya 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA2015), pp.221-224, Dec. 2015. [Abstract | pdf] Class-E^2 inductive power transfer system with pre- and post-regulators Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya 4th International Conference on Renewable Energy Research and Applications (ICRERA2015), Nov. 2015. [Abstract | pdf] Class-D inverter with MOSFET nonlinear parasitic capacitance Koyo Yonekura, Xiuqin Wei, Tomoharu Nagashima, Hiroo Sekiya, and Tadashi Suetsugu 4th International Conference on Renewable Energy Research and Applications (ICRERA2015), Nov. 2015. [Abstract | pdf] A design of inductively coupled wireless power transfer system with coupling coil optimization Takumi Noda, Tomoharu Nagashima, and Hiroo Sekiya The 37th International Telecommunications Energy Conference (INTELEC2015), pp.864-869, Oct. 2015. [Abstract | pdf] Analytical design for resonant inductive coupling wireless power transfer system with class-E inverter and class-DE rectifier Tomoharu Nagashima, Xiuqin Wei, Elisenda Bou, Eduard Alarcon, and Hiroo Sekiya 2015 IEEE International Symposium on Circuits and Systems (ISCAS2015), pp.686-689, May 2015. [Abstract | pdf] [Invited Talk] Analytical design procedure for resonant inductively coupled class-E^2 wireless power transfer system Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya 2014 IEEE Workshop on Nonlinear Circuit Networks (NCN2014), Dec. 2014. [Abstract | pdf] Numerical algorithm for distribution-map derivations of switching converters Yuta Yamada, Tomoharu Nagashima, Yoshifumi Ibuki, Yoshiki Fukumoto, and Hiroo Sekiya The 40th Annual Conference of the IEEE Industrial Electronics Society (IECON 2014), pp.4338-4344, Nov. 2014. [Abstract | pdf] Analytical design procedure for resonant inductively coupled wireless power transfer system with class-DE inverter and class-E rectifier Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya 2014 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS2014),, pp.288-291, Nov. 2014. [Abstract | pdf] A loosely coupled inductive wireless power transfer systems with class-E transmitter and multiple receivers Hiroo Sekiya, Kazuhide Inoue, Tomoharu Nagashima, Tadashi Suetsugu, Shotaro Kuga, Xiuqin Wei, Kenichi Shirota, Hironobu Hatamoto, and Satoru Shimizu 2014 IEEE Energy Conversion Congress and Exposition (ECCE2014), pp.675-680, Sept. 2014. [Abstract | pdf] Operation of class-E^2 DC-DC converter outside nominal conditions Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA2014), pp.478 - 481, Sept. 2014. [Abstract | pdf] Analytical design procedure for resonant inductively coupled wireless power transfer with class-E^2 DC-DC converter Tomoharu Nagashima, Kazuhide Inoue, Xiuqin Wei, Elisenda Bou, Eduard Alarcon, Marian K. Kazimierczuk, and Hiroo Sekiya 2014 IEEE International Symposium on Circuits and Systems (ISCAS2014), pp.113-116, June 2014. [Abstract | pdf] Multiphase resonant inverters with common resonant circuit Mariusz Bojarski, Dariusz Czarkowski, Francisco de Leon, Qijun Deng, Marian K. Kazimierczuk, and Hiroo Sekiya 2014 IEEE International Symposium on Circuits and Systems (ISCAS2014), pp.2445-2448, June 2014. [Abstract | pdf] Class E^2 resonant non-radiative wireless power transfer link: a design-oriented joint circuit-system co-characterization approach Elisenda Bou,Tomoharu Nagashima, Hiroo Sekiya, and Eduard Alarcon 2014 IEEE International Multi-Conference on Systems, Signals and Devices (SSD2014), pp.1-4, Feb. 2014. [Abstract | pdf] MOSFET Parasitic Capacitance Effects to Class-DE Power Amplifier Hiroo Sekiya, Xiuqin Wei, and Tomoharu Nagashima 2013 IEEE Electrical Design of Advanced Packaging & System Symposium (EDAPS2013), pp.245-248, Dec. 2013. [Abstract | pdf] Design of high-efficiency inductive-coupled wireless power transfer system with class-DE transmitter and class-E rectifier Kazuhide Inoue, Tomoharu Nagashima, Xiuqin Wei, Hiroo Sekiya The 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013), pp.611-616, Nov. 2013. [Abstract | pdf] Analysis of class E_M amplifier with considering non-zero current fall time of drain current Zhicai Zhang, Xiuqin Wei, Hiroo Sekiya, Naoki Oyama, Tadashi Suetsugu, and Tomoharu Nagashima International Future Energy Electronics Conference 2013 (IFEEC2013), pp.338-343, Nov. 2013. [Abstract | pdf] Inductively coupled wireless powertransfer with class-E^2 DC-DC converter Tomoharu Nagashima, Kazuhide Inoue, Xiuqin Wei, Elisenda Bou, Eduard Alarcon, and Hiroo Sekiya The 21th European Conference of Circuits Technology and Devices(ECCTD2013), Sept. 2013. [Abstract | pdf] High-frequency high-efficiency resonant converter with class-E_M inverter and class-E rectifier Hiroo Sekiya, Xiuqin Wei, and Tomoharu Nagashima IEEE 56th Intl Midwest Symposium on Circuits & Systems (MWSCAS2013), pp.33-36, Aug. 2013. [Abstract | pdf] Effect of MOSFET Parasitic Capacitances on EER Transmitter with Class-E Amplifier Xiuqin Wei, Tomoharu Nagashima, Hiroo Sekiya, and Tadashi Suetsugu 2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), pp.913-916, May 2013. [Abstract | pdf] Numerical derivations of locking ranges for injection-locked class-E oscillator Tomoharu Nagashima, Xiuqin Wei, Hisa-Aki Tanaka, and Hiroo Sekiya The 10th IEEE International Conference on Power Electronics and Drive Systems (PEDS2013), pp.1021-1024, Apr. 2013. [Abstract | pdf] Negative-bias driving voltage for class-E GaN HEMT oscillator using a diode Youhei Noguchi, Xiuqin Wei, Tomoharu Nagashima, Hiroo Sekiya, and Tadashi Suetsugu 2013 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'13), pp.201-204, Mar. 2013. [Abstract | pdf] Inductively coupled wireless power transfer with class-DE power amplifier Tomoharu Nagashima, Xiuqin Wei, Tadashi Suetsugu, and Hiroo Sekiya 2012 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS2012), , pp.73-76, Dec. 2012. [Abstract | pdf] Analytical derivation of switching-pattern distribution for class-E amplifier using bifurcation theory Tomoharu Nagashima , Xiuqin Wei, Takuji Kousaka, and Hiroo Sekiya 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.687-690, Oct. 2012. [Abstract | pdf] Bifurcation in injection-locked class-EM oscillator Ryuta Nakamura, XiuqinWei, Takuji Kousaka, and Hiroo Sekiya 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.691-694, Oct. 2012. [Abstract | pdf] Influence of nonlinear shunt capacitance in harmonic distortion in output envelope of drain voltage modulated Class E amplifier Tadashi Suetsugu, Hiroo Sekiya, and Xiuquin Wei 2012 International Symposium on Nonlinear Theory and its Applications (NOLTA2012), pp.614-617, Oct. 2012. [Abstract | pdf] Approximate analysis for class-EM amplifier taking into account harmonic frequency components Taro Kakimoto, Tomoharu Nagashima, Xiuqin Wei and Hiroo Sekiya 2012 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP2012), pp.154-157, Mar. 2012. [Abstract | pdf] An enhanced PSO algorithm for designing class E amplifier Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya 2012 RISP International Workshop on Nonlinear Circuits, Communications, and Signal Processing (NCSP2012), pp.146-149, Mar. 2012. [Abstract | pdf] Design of symmetric class-E_M power amplifier Xiuqin Wei, Tomoharu Nagashima, Shingo Kuroiwa, Hiroo Sekiya 37th Annual Conference on IEEE Industrial Electronics Society (IECON2011) , pp.1300-1305 , Nov. 2011. [Abstract | pdf] Fundamental study on drain efficiency of EDSM/EPWM transmitter using class-EM amplifier Makoto Taromaru, Naoki Oyama, Hiroo Sekiya, and Tadashi Suetsugu Proc. 2011 Korea-Japan Microwave Conf. (KJMW 2011), pp.134-137, Nov. 2011. [Abstract | pdf] Design of class-DE power amplifier including optimal design of resonant inductor Hiroo Sekiya, Natsumi Sagawa, Yuzhen Li, and Marian K. Kazimierczuk Electrical Manufacturing Coil Winding & Coating Expo (EMCW2011), Sept. 2011. [Abstract | pdf] The dynamic behavior of the class-E_M amplifier outside of nominal conditions Ryuta Nakamura, Hiroo Sekiya, and Takuji Kousaka International Workshop on Nonlinear Maps and their Applications (NOMA2011), pp.38-40, Sept. 2011. [Abstract | pdf] Acceleration of PSO for designing class E amplifier Yuichi Tanji, Haruna Matsushita, and Hiroo Sekiya 2011 International Symposium on Nonlinear Theory and Its Appilcations (NOLTA2011), pp.492-495, Sept. 2011. [Abstract | pdf] Power conversion efficiency of class-E power amplifier outside nominal operation Tomoharu Nagashima, Xiuqin Wei, Hiroo Sekiya, and Marian K. Kazimierczuk 2011 IEEE International Symposium on Circuits and Systems (ISCAS2011) , pp.749-752, May 2011. [Abstract | pdf] Isolated class-E switching converter with high-frequency high-efficiency operation for low-voltage/high-current output applications Natsumi Sagawa and Hiroo Sekiya 2010 IEEE Region 10 Conference (TENCON2010), pp.1851-1856, Nov. 2010. [Abstract | pdf] Core geometry coefficient for resonant inductors Hiroo Sekiya and Marian K. Kazimierzuk Electrical Manufacturing Coil Winding & Coating Expo (EMCW2010), Oct. 2010. [Abstract | pdf] Inter-connection of parallel connected class D amplifiers operated at different switching frequencies Yusuke Ishikawa, Ryuta Yamamoto, Hiroyuki Uchiyama, Xiuqin Wei, Hiroo Sekiya, and Tadashi Suetsugu 2010 International Symposium on Nonlinear Theory and its Applications (NOLTA2010), pp.51-54, Sept. 2010. [Abstract | pdf] Design of class-E amplifier using particle swarm optimization   Yuichi Tanji and Hiroo Sekiya 2010 International Symposium on Nonlinear Theory and its Applications (NOLTA2010), pp.517-519, Sept. 2010. [Abstract | pdf] Analysis and design of class-DE amplifier with nonlinear shunt capacitances at any duty ratio Hiroo Sekiya and Marian K. Kazimierczuk 2010 International Symposium on Nonlinear Theory and its Applications (NOLTA2010), pp.362-365, Sept. 2010. [Abstract | pdf] Effect of MOSFET gate-to-drain parasitic capacitance on class-E power amplifier Xiuqin Wei, Hiroo Sekiya, Shingo Kuroiwa, Tadashi Suetsugu, and Marian K. Kazimierczuk 2010 IEEE International Symposium on Circuits and Systems (ISCAS2010) , pp.3200-3203 , June 2010. [Abstract | pdf] Computer-aided design for class-E switching circuits taking into account optimized inductor designs Natsumi Sagawa, Hiroo Sekiya, and Marian K. Kazimierczuk 2010 Twenty-Fifth IEEE Applied Power Electronics Conference and Exposition (APEC2010), pp.2212-2219, Feb. 2010. [Abstract | pdf] Design of class-EM power amplifier with one input signal Ryosuke Miyahara and Hiroo Sekiya European Conference on Cognitive Ergonomics 2009 (ECCE2009), pp.3859-3864, Sept. 2009. [Abstract | pdf] Design of RF-choke inductors using core geometry coefficient Hiroo Sekiya and Marian K. Kazimierczuk Electrical Manufacturing Coil Winding & Coating Expo (EMCW2009), Sept. 2009. [Abstract | pdf] Design of AC resonant inductors using area product method Marian K. Kazimierczuk and Hiroo Sekiya 2009 IEEE Energy Conversion Congress and Exposition (ECCE2009), pp.994-100, Sept. 2009. [Abstract | pdf] Design of class-DE amplifier with linear and nonlinear shunt capacitances for 25 % duty ratio Hiroo Sekiya, Ryosuke Miyahara, and Marian K. Kazimierczuk 2009 IEEE International Symposium on Circuits and Systems (ISCAS2009) , pp.2870-2873 , May 2009. [Abstract | pdf] Experimental evaluation of interleaving technique in class E2 dc/dc converter with phase control Motoki Katayama, Hiroo Sekiya, and Marian K. Kazimierczuk 2009 International Workshop on Nonlinear Circuits and Signal Processing (NCSP2009), pp.593-596, Mar. 2009. [Abstract | pdf] Design of class-EM power amplifier taking into account auxiliary circuit Ryosuke Miyahara, Hiroo Sekiya, and Marian K. Kazimierczuk The 34th Annual Conference of the IEEE Industrial Electronics Society (IECON2008), pp.679-68, Nov. 2008. [Abstract | pdf] [Invited Talk] Optimal core and wire of resonant inductor for class-E amplifier Hiroo Sekiya, and Marian K. Kazimierczuk International Workshop on Vision, Communications and Circuits (IWVCC2008), pp.3-6, Nov. 2008. [Abstract | pdf] Design of class DE amplifier with nonlinear shunt capacitances for any output Q Toru Ezawa, Hiroo Sekiya, and Takashi Yahagi 2008 IEEE International Symposium on Circuits and Systems (ISCAS2008), pp.2910-2913, May 2008. [Abstract | pdf] An interleaved class E^2 dc/dc converter Motoki Katayama, Hiroo Sekiya, and Takashi Yahagi 2008 IEEE International Symposium on Circuits and Systems (ISCAS2008), pp.2833-2836, May 2008. [Abstract | pdf] Analysis and design of class DE amplifier with nonlinear shunt capacitance Hiroo Sekiya, Takayuki Watanabe, Tadashi Suetsugu, and Marian K. Kazimierczuk The 7th International Conference on Power Electronics and Drive Systems (PEDS2007), pp.937-942, Nov. 2007. [Abstract | pdf] Implementation of design tool for class E switching circuits using Spice Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 2007 International Symposium on Nonlinear Theory and its Applications (NOLTA2007), pp.509-512, Sept. 2007. [Abstract | pdf] Design of class DE inverter with band-pass filter Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 32nd Annual Conference of the IEEE Industrial Electronics Society (IECON2006), pp.2723-2728, Nov. 2006. [Abstract | pdf] Effects of characteristics of band-pass filter to operation of class DE inverter Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 2006 International Symposium on Nonlinear Theory and its Applications (NOLTA2006), pp.523-526, Sept. 2006. [Abstract | pdf] Operation of class DE amplifier outside optimum condition Hiroo Sekiya, Takahiro Negishi, Tadashi Suetsugu, and Takashi Yahagi 2006 IEEE International Symposium on Circuits and Systems (ISCAS2006), pp.241-244, May 2006. [Abstract | pdf] Adaptive sliding mode control using simple adaptive control for SISO nonlinear systems Muhammad Yasser, Agus Trisanto, Jianming Lu, Hiroo Sekiya, and Takashi Yahagi The 2006 IEEE International Symposium on Circuits and Systems (ISCAS2006), pp.2153-2156, May 2006. [Abstract | pdf] Steady-state behavior of class DE amplifier outside optimum conditions Takahiro Negishi, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 2006 RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP2006), pp.263-266, Mar. 2006. [Abstract | pdf] Phase controlled class E^2 dc/dc converter with single RF choke core Tsutomu Asano, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 2006 RISP International Workshop on Nonlinear Circuits and Signal Processing (NCSP2006), pp.267-270, Mar. 2006. [Abstract | pdf] Design of class E amplifier with any output Q and nonlinear capacitance on MOSFET Hiroo Sekiya, Yoji Arifuku, Hiroyuki Hase, Jianming Lu, and Takashi Yahagi 2005 European Conference on Circuit Theory and Design (ECCTD'05), pp.105-108 , Aug. 2005. [Abstract | pdf] Optimization procedure of class E amplifiers using SPICE Yuichi Tanji, Hiroo Sekiya, and Hideki Asai 2005 European Conference on Circuit Theory and Design (ECCTD2005), vol.3, pp.133-136, Aug. 2005. [Abstract | pdf] Resonant dc/dc converter with class E oscillator Hiroyuki Hase, Hiroo Sekiya, Jianming Lu and Takashi Yahagi 2005 IEEE International Symposium on Circuits and Systems (ISCAS2005), pp.720-723, May 2005. [Abstract | pdf] Design and experimental results of resonant dc/dc converter with class E oscillator Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 2005 RISP International Workshop on Nonlinear Circuit and Signal Processing (NCSP2005), pp.219-222, Mar. 2005. [Abstract | pdf] Incomplete shooting method for finding steady state responses of nonlinear circuits Yuichi Tanji, Hiroo Sekiya, and Hideki Asai 2005 InternationalWorkshop on Nonlinear Circuits and Signal Processing (NCSP2005), pp.495-498, Mar. 2005. [Abstract | pdf] Design procedure for generalized class E amplifiers with implicit circuit equations Hiroo Sekiya, Yuichi Tanji, Jianming Lu, and Takashi Yahagi 2004 International Symposium on Nonlinear Theory and its Appication (NOLTA2004), pp.303 - 306, Nov. 2004. [Abstract | pdf] Novel design procedure forMOSFET class E oscillator Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, Takashi Yahagi The 47th 2004 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS2004), July 2004. [Abstract | pdf] Class E inverter using thinned-out method Muzafar Bin Mohd Yusoff, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi International Telecommunications Energy Conference (INTELEC2003), pp.451-459, Oct. 2003. [Abstract | pdf] Phase control for resonant dc/dc converter with class DE inverter and class E rectifier Hiroo Sekiya, Shuichi Nemoto, Shuichi Nemoto, Jianming Lu, and Takashi Yahagi The 20th European Conference on Circuit Theory and Design (ECCTD2003), no.II, pp.121-124, Sept. 2003. [Abstract | pdf] Design and analysis of class DE amplifier with any output Q, any duty ratio and switch on resistance Hiroo Sekiya, Satoki Oshikawa, Jianming Lu, and Takashi Yahagi 2003 IEEE International Symposium on Circuits and Systems (ISCAS2003), pp.III-280-283, May 2003. [Abstract | pdf] Design and analysis of class DE-E dc/dc converters with any output Q of the inverter and any duty ratio Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 2002 International Symposium on Nonlinear Theory and its Applications (NOLTA2002), pp.207-210, Oct. 2002. [Abstract | pdf] Design of generalized class E^2 dc/dc converter Hiroo Sekiya, Jianming Lu, and Takashi Yahagi 2002 IEEE International Symposium on Circuits and Systems (ISCAS2002), pp.656-659, May 2002. [Abstract | pdf] Computation of design values for class E amplifier without using waveform equations H. Sekiya, I. Sasase, S. Mori, J. Lu, and T. Yahagi 44th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS2001), pp.960-963, Aug. 2001. [Abstract | pdf]

(in Japanese) , Apr. 2025. [Abstract | pdf]  (in Japanese) , Jan. 2025. [Abstract | pdf]  (in Japanese) , Jan. 2025. [Abstract | pdf]  (in Japanese) , July 2024. [Abstract | pdf] , July 2024. [Abstract | pdf]  (in Japanese) , Mar. 2024. [Abstract | pdf]  (in Japanese) , vol.123, no.420, pp.6-11, Mar. 2024. [Abstract | pdf]  (in Japanese) Yutaro Komiyama, Akihiro Konishi, Ayano Komanaka, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya , vol.123, no.343, pp.83-87, Jan. 2024. [Abstract | pdf]  (in Japanese) , vol.123, no.343, pp.93-97, Jan. 2024. [Abstract | pdf] 無線通信と無線給電を用いたワイヤフリーロボットの研究開発 (in Japanese) 芹澤和伸, 松室尭之, 清水聡, 関屋大雄 IEICE Tech. Rep, Oct. 2023. [Abstract | pdf] Load-Independent Multiple Output WPT System for Realizing Wire-Free Robots (in Japanese) Akihiro Konishi, Ken Onodera, Yutaro Komiyama, Kien Nguyen, Hiroo Sekiya 2023 Annual Conference on Electronics, Information and Systems Institute of Electrical Engineers of Japan, pp.1318-1323, Sept. 2023. [Abstract | pdf] A multi-receiver WPT system with load-independent class-E/F inverter (in Japanese) HanXiao Wang,Yutaro Komiyama,Xiuqin Wei,Akihiro Konishi,Kien Nguyen,Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications , vol.123, no.119, pp.61-66, July 2023. [Abstract | pdf] Design of CC/CV Output Load-Independent High-Frequency WPT System (in Japanese) Jiaxin YAN, Wenqi ZHU, Yutaro KOMIYAMA, Akihiro KONISHI, xiuqin WEI, Kien NGUYEN, Hiroo SEKIYA Technical Committee on Energy Engineering in Electronics and Communications , vol.123, no.119, pp.55-60, July 2023. [Abstract | pdf] Robust 6.78MHz Wireless Power Transfer System for Multiple Receivers against Load Variations and Misalignment (in Japanese) Hanxiao Wang, Yutaro Komiyama, Xiuqin Wei, Kien Nguyen, Hiroo Sekiy The 2023 IEICE NOLTA Conference, June 2023., June 2023. [Abstract | pdf] Design of A Constant-Current/Constant-Voltage Output Load-independent WPT System for Battery Charging (in Japanese) JiaXin Yan, WenQi Zhu, Yutaro Komiyama, YinChen Xie, Kien Nguyen, Hiroo Sekiya The 2023 IEICE NOLTA Conference, June 2023., no.NLS-41, June 2023. [Abstract | pdf] Load-independent Class-E Inverter with Constant-Current and Constant-Voltage Output  (in Japanese) Wenqi ZHU, Ayano KOMANAKA, Yutaro KOMIYAMA, Kien NGUYEN, Hiroo SEKIYA Technical Committee on Energy Engineering in Electronics and Communications , Mar. 2023. [Abstract | pdf] Simple Applications of WiBIC with Asynchronous Pulse Code Multiple Access (in Japanese) Jiaying LIN, Nagasawa RYUJI, Kien NGUYEN, Hiroyuki TORIKAI, Mikio HASEGAWA, Won-Joo HWANG, Hiroo SEKIYA IEICE Technical Report, vol.122, no.453, pp.85-90, Mar. 2023. [Abstract | pdf] Load-Independent Constant-Current Output Series-Resonant Inverter (in Japanese) Yutaro Komiyama, Wenqi Zhu, Kien Nguyen, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications EE2022-42, vol.122, no.343, pp.89-94, Jan. 2023. [Abstract | pdf] Maximum Efficiency Tracking for Wireless Power Transfer with Multiple Receivers (in Japanese) Toshihiro MATSUDA, Yutaro KOMIYAMA ,Wenqi ZHU,Kien NGUYEN,Hiroo SEKIYA The institute of electronics Information and communication engineers (EE) EE2022-12, pp.22-26, July 2022. [Abstract | pdf] Design of Class-E Frequency Doubler with Robustness to Load Variation  (in Japanese) Yinchen Xie, Wenqi Zhu, Yutaro Komiyama, Kien Nguyen and Hiroo Sekiya The institute of electronics Information and communication engineers (EE), vol.122, no.109, pp.11-16, July 2022. [Abstract | pdf] Pre- and Post-Regulation Control with Multiple Receiver Wireless Power Transfe (in Japanese) Toshihiro Matsuda,Yutaro Komiyama,Wenqi Zhu,Kien Nguyen,Hiroo Sekiya The 2022 IEICE NOLTA Conference, June 2022., p.37, June 2022. [Abstract | pdf] Analysis and Desugn of Load-independent Class-E Frequency Multiplier Yinchen Xie, Wenqi Zhu, Yutaro Komiyama, Kien Nguyen, Hiroo Sekiya The 2022 IEICE NOLTA Conference, June 2022., June 2022. [Abstract | pdf] Optimization software for high-frequency converter designs with heuristic algorithm and SPICE (in Japanese) Yuichi Hirama,Yutaro Komiyama,Wenqi Zhu ,Kien Nguyen,Hiroo Sekiya ECT-22-011, Mar. 2022. [Abstract | pdf] Principle Operation and Design Example of Mutli-hop Magnetic-Resonant Wireless Power Transfer System (in Japanese) Hiroo Sekiya IEICE Tech. Rep, vol. 121, no. 234 , pp.111-116, Nov. 2021. [Abstract | pdf] Design Theory of Multi-Hop Multi-Output Load-Independent Wireless Power Transfer Systems (in Japanese) Hiroo Sekiya, Katsuki Tokano, Kien Nguyen, Satoru Shimizu, Kazunobu Serizawa, Kazushi Sakuma, Yoshinori Suzuki IEICE Tech. Rep., EE2021-13, pp.6-11, Oct. 2021. [Abstract | pdf] Load-Independent Multi-power Multi-hop WPT System for Robot Arm (in Japanese) Katsuki TOKANO, Wenqi ZHU, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2021-14, pp.12-17, Oct. 2021. [Abstract | pdf] Analysis and Design of Load-Independent ZVS Parallel-Resonant Inverter (in Japanese) Ayano KOMANAKA, Wenqi ZHU, Xiuqin WEI,Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Semiconductor Power Converter IEEJ Industry Applications Society (SPC) SPC-21-099, pp.26-31, July 2021. [Abstract | pdf] Design of Load-Independent Multi-hop WPT System for Robot Arm (in Japanese) Katsuki TOKANO, Wenqi ZHU, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Semiconductor Power Converter IEEJ Industry Applications Society (SPC) SPC-21-100, pp.32-37, July 2021. [Abstract | pdf] Load-Independent Class-E Inverter with Frequency-Modulation Control (in Japanese) Yutaro KOMIYAMA, Kien NGUYEN, Taichi MISHIMAN, Yuki ITO, Takeshi UEMATSU, and Hiroo SEKIYA IEICE Tech. Rep., EE2021-8, vol.121, no.124, pp.6-11, July 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits (in Japanese) Wenqi ZHU, Katsuki TOKANO, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2020-46, Mar. 2021. [Abstract | pdf] Load Independent E^2 Design of Class 2 DC-DC Converters (in Japanese) Tatsuki OSATO, Xiuqin WEI, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2020-45, pp.28-33, Mar. 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits (in Japanese) Wenqi ZHU, Katsuki TOKANO, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep.,EE2020-46, pp.34-38, Mar. 2021. [Abstract | pdf] Optimal Design of Multi-hop WPT System for Robot Arm (in Japanese) Katsuki TOKANO, Wenqi ZHU, Tatsuki OSATO, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Energy Engineering in Electronics and Communications EE2020-11, Oct. 2020. [Abstract | pdf] Analysis and Design of Load-Independent ZCS Parallel- Resonant Inverter at Any Duty Ratio (in Japanese) Ayano KOMANAKA, Wenqi ZHU, Hiroo SEKIYA, Kien NGUYEN, and Xinqin WEI Technical Committee on Energy Engineering in Electronics and Communications EE2019-53, Jan. 2020. [Abstract | pdf] Analysis and design of class-E/F3 inverter (in Japanese) Jingyue MA, Asiya, Xiuqin WEI, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Energy Engineering in Electronics and Communications, Jan. 2020. [Abstract | pdf] ZCS Parallel Resonant Oscillator (in Japanese) Shuya Matsuhashi, Yoshiro Hara, Kien Nguyen, Hiroo Sekiya, Takeshi Uematsu, Shingo Nagaoka, and Taichi Mishima Technical Committee on Energy Engineering in Electronics and Communications EE2019-55, Jan. 2020. [Abstract | pdf] Design of outphasing class-D ZVS amplifier (in Japanese) Tatsuki OHSATO†, Xiuqin WEI, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Semiconductor Power Converter IEEJ Industry Applications Society, July 2019. [Abstract | pdf] Proposal of Load-independent Class-E^−1 Inverter (in Japanese) Yuta Ozawa, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.118, no.387, pp.43-48, Jan. 2019. [Abstract | pdf] Analysis and design of Class Φ driver circuit without resonance circuit (in Japanese) Hanako Matsubara, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.118, no.387, pp.37-41, Jan. 2019. [Abstract | pdf] Inductor optimization software by Ap method and Kg method (in Japanese) Akane Iwasaki, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.118, no.387, pp.31-36, Jan. 2019. [Abstract | pdf] Analysis and design of wireless power transfer system based on class-D^2 DC-DC converter (in Japanese) Shohei Mita, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.118, no.387, pp.25-30, Jan. 2019. [Abstract | pdf] Maximum efficiency tracking of high frequency magnetic resonance wireless power transfer system with class-D rectifier (in Japanese) Yoshiro Hara, Tatsuki Ohsato, and Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2018. [Abstract | pdf] Design of high-frequency soft-switching resonant driver for SiC Class-D inverter (in Japanese) Ryoko Sugano, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2018. [Abstract | pdf] Analysis of out of phase controlled class D inverter with MOSFET at antiparallel diode (in Japanese) Tatsuki Ohsato, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2018. [Abstract | pdf] Design and control of phase-controlled Class-D ZVS inverter with the voltage clamp function (in Japanese) Yusuke Ishihara, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.117, no.424, pp.41-46, Jan. 2018. [Abstract | pdf] Analysis of wireless power transfer system with asymmetrical duty-cycle controlled class-D ZVS inverter (in Japanese) Shohei Mita, Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, vol.117, no.424, pp.47-52, Jan. 2018. [Abstract | pdf] Analysis of asymmetrical duty cycle-controlled DC-DC converter with class-D ZVS inverter and full wave rectier (in Japanese) Shohei Mita, Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2017. [Abstract | pdf] Steady-state analysis of friver circuit of SiC MOSFETbased on class-E inverter (in Japanese) Hanako Matsubara, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2017. [Abstract | pdf] Maximum efficiency tracking of the class-E2 wireless power transfer system (in Japanese) Yuta Ozawa, Hiroo Sekiya Technical Committee on Semiconductor Power Convert, July 2017. [Abstract | pdf] Design And Control of Phase-Controlled Class-D ZVS Inverter With Current Protection (in Japanese) Yudai Nagata, Yoshiki Fukumoto, Tatsuya Ikenari, Hiroo Sekiya Technical Committee on Semiconductor Power Converter, July 2017. [Abstract | pdf] Steady-state analytical expression for voltage shift by diode in resonant drivers (in Japanese) Hanako Matsubara, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications, May 2017. [Abstract | pdf] Proposal and analysis of class-E/F3 rectifier (in Japanese) Takumi Murayama, Xiuqin Wei, and Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications (EE), pp.101-105, Feb. 2017. [Abstract | pdf] Characteristics comparison of class-E^2 and class-D-E wireless power transfer system (in Japanese) Takumi Noda, Takumi Murayama,and Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications (EE), Nov. 2016. [Abstract | pdf] Experimental Evaluations of Thinned-out and PDM Controlled Class-E Rectifier (in Japanese) Akane Iwasaki, Tomoharu Nagashima,and Hiroo Sekiya Technical Committee on Energy Engineering in Electronics and Communications (EE) , pp.43-48, Oct. 2016. [Abstract | pdf] Output power capability comparisons of class E power amplifiers with harmonic resonance (in Japanese) Takumi MURAYAMA , Xiuqin WEI, and Hiroo SEKIYA IEEJ Technical Meeting on Semiconductor Power Converte, July 2016. [Abstract | pdf] Output power capability comparisons of class E power ampliers with harmonic resonance (in Japanese) Yuchong SUN, Xiuqin WEI, and Hiroo SEKIYA Technical Committee on Energy Engineering in Electronics and Communications, May 2016. [Abstract | pdf] Analytical design of a high-speed SiC MOSFET gate driver using isolated class-E inverter  (in Japanese) Ryoko Sugano, Yuchong Sun, Hiroo Sekiya, Takashi Hikihara Technical Committee on Energy Engineering in Electronics and Communications, May 2016. [Abstract | pdf] A comprehensive design method of inductively coupled wireless power transfer system for maximizing overall efficiency (in Japanese) Takumi Noda, Tomoharu Nagashima, and Hiroo Sekiya IEICE Technical Committee on Wireless Power Transfer, vol.115, no.129, pp.31-36, July 2015. [Abstract | pdf] Consideration and implementation of pulse density modulation control for class-E rectifier (in Japanese) Go Yonezawa, Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.114, no.484, pp.57-61, Mar. 2015. [Abstract | pdf] Output control for class-E^2 DC-DC converter achieving zero voltage switching (in Japanese) Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.114, no.414, pp.143-146, Jan. 2015. [Abstract | pdf] Analytical design of resonant inductively coupled wireless power transfer system with class-E2 DC-DC converter Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya The 1st Symposium on Semiconductor Power Conversion (S2PC), Oct. 2014. [Abstract | pdf] A loosely coupled wireless power transfer system with class-DE transmitter and multiple receivers Kazuhide Inoue, Tomoharu Nagashima, and Hiroo Sekiya The 1st Symposium on Semiconductor Power Conversion (S2PC), Oct. 2014. [Abstract | pdf] Steady-state analysis of class-E^2 DC-DC converter outside nominal condition (in Japanese) Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya The 27th WorkShop on Circuits and Systems, pp.7-12, Aug. 2014. [Abstract | pdf] MOSFET nonlinear capacitance effect on EER transmitter with class-E amplifier (in Japanese) Xiuqin Wei, Tomoharu Nagashima, Hiroo Sekiya, and Tadashi Suetsugu IEICE Technical Committee on Nonlinear Problems, pp.63-67, May 2014. [Abstract | pdf] Analytical design for resonant inductively coupled wireless power transfer with class-E^2 DC-DC converter (in Japanese) Tomoharu Nagashima, Kazuhide Inoue, Xiuqin Wei, and Hiroo Sekiya IEICE Technical Committee on Wireless Power Transmission, pp.23-27, Jan. 2014. [Abstract | pdf] Design of class-E inverter with inductive impedance inverter for achieving ZVS at any load resistance Tomoharu Nagashima, Xiuqin Wei, Tadashi Suetsugu, and Hiroo Sekiya 2013 Japan-Korea Joint Technical Workshop on Semiconductor Power Converter, Oct. 2013. [Abstract | pdf] Resonant Converter with Class E_M Inverter (in Japanese) Hiroo Sekiya, Tomoharu Nagashima, and Xiuqin Wei IEICE Technical Report, pp.35-40, Oct. 2013. [Abstract | pdf] Design of wireless power transfer system through electromagnetic induction with class-DE transmitter and class-E rectifier (in Japanese) Kazuhide Inoue, Tomoharu Nagashima, Hiroo Sekiya, Hironobu Hatamoto, Satoru Shimizu IEEJ Technical Meeting on Semiconductor Power Converte, July 2013. [Abstract | pdf] Behaviors of EER transmitter with class-E amplifier due to MOSFET parasitic capacitances Xiuqin Wei, Tomoharu Nagashima, Hiroo Sekiya, and Tadashi Suetsugu The 26th WorkShop on Circuits and Systems, pp.380-384, July 2013. [Abstract | pdf] High-frequency high-efficiency resonant converter with class-EM inverter and class-E rectifier (in Japanese) Hiroo Sekiya, Xiuqin Wei, Tomoharu Nagashima The 26th Workshop On Circuits and Systems, pp.273-278, July 2013. [Abstract | pdf] Design of class-E inverter with inductive impedance inverter for achieving zero voltage switching at any load resistance (in Japanese) Tomoharu Nagashima, Xiuqin Wei, Tadashi Suetsugu, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.113, no.69, pp.71-75, May 2013. [Abstract | pdf] Parallel connected class D amplifiers for RF power source applications Tadashi Suetsugu, Xiuqin Wei, Tomoharu Nagashima, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.112, no.487, pp.33-36, Mar. 2013. [Abstract | pdf] Analysis of class-E_M amplier taking into acount drain current fall time (in Japanese) Zhicai Zhang, Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.112, no.487, pp.37-42, Mar. 2013. [Abstract | pdf] Resonant class E rectifier for wireless power transfer in contactless IC card reader/writer Tadashi Suetsugu, Xiuqin Wei, Kazunari Shimazaki, Tomoharu Nagashima, and Hiroo Sekiya 2012 Korea-Japan Joint Technical Workshop on Semiconductor Power Converter, pp.58-61, Nov. 2012. [Abstract | pdf] Comparisons of RF choke inductor designs by area product and core geometry Hiroo Sekiya 2012 Korea-Japan Joint Technical Workshop on Semiconductor Power Converter, pp.45-49, Nov. 2012. [Abstract | pdf] Analytical derivation of power conversion efficiency for class-E amplifier with any Q (in Japanese) Tomoharu Nagashima, Xiuqin Wei, Takuji Kousaka, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.112, no.6, pp.115-120, Apr. 2012. [Abstract | pdf] Analytical derivation of switching-pattern distribution for class-E amplier using bifurcation theory (in Japanese) Tomoharu Nagashima, Xiuqin Wei, Takuji Kousaka, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.111, no.276, pp.49-54, Nov. 2011. [Abstract | pdf] Push-Pull Class-EM Power Amplifier Xiuqin Wei, Hiroo Sekiya, and Shingo Kuroiwa The 24th Workshop on Circuits and Systems, pp.254 - 259, Aug. 2011. [Abstract | pdf] Operation of class-E amplifier outside nominal conditions (in Japanese) Tomoharu Nagashima and Hiroo Sekiya The 24th Workshop on Circuits and Systems, pp.242 - 247, Aug. 2011. [Abstract | pdf] Fundamental study on drain efficiency of EPWM transmitter using class-EM Power amplifier (in Japanese) Naoki Oyama, Hiroo Sekiya, Makoto Taromaru, and Tadashi Suetsugu IEICE Technical Committee on Radio Communication Systems, vol.111, no.145, pp.157-162, July 2011. [Abstract | pdf] Dynamic behavior of the class-EM amplifier with one input signal (in Japanese) Ryuta Nakamura, Hiroo Sekiya, Takuji Kousak IEICE Technical Committee on Nonlinear Problems, vol.111, no.106, pp.161-164, July 2011. [Abstract | pdf] Symmetrical class-E_M power amplier for very low harmonic-content applications (in Japanese) Xiuqin Wei, Tomoharu Nagashima, Shingo Kuroiwa, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.111, no.106, pp.165-170, June 2011. [Abstract | pdf] Power conversion efficiency of class-E power amplifier outside nominal operation (in Japanese) Tomoharu Nagashima, Xiuqin Wei, and Hiroo Sekiya IEICE Technical Committee on Nonlinear Problems, vol.111, no.106, pp.171-175, June 2011. [Abstract | pdf] Effect of MOSFET gate-to-drain parasitic capacitance on class-E power amplifie (in Japanese) Xiuqin Wei, Hiroo Sekiya, Tadashi Suetsugu, and Marian K. Kazimierczuk The 23th Workshop on Circuits and Systems in Karuizawa, pp.67 - 72, Apr. 2010. [Abstract | pdf] Design of auxiliary circuit on class-E_M power amplifier (in Japanese) Ryosuke Miyahara, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.107, no.477, pp.31-36, Jan. 2008. [Abstract | pdf] Design of interleaved full-bridge converter (in Japanese) Tomomi Dohi, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.107, no.477, pp.37-40, Jan. 2008. [Abstract | pdf] An interleaved class E^2 dc/dc converter (in Japanese) Motoki Katayama, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEEJ Workshop on Electronic Circuits, vol.ECT - 07 - 91, pp.15-20, Dec. 2007. [Abstract | pdf] Interleaved class E^2 dc/dc converter with phase control (in Japanese) Motoki Katayama, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, pp.7-12, Nov. 2007. [Abstract | pdf] Effect of nonlinear output capacitance in class DE amplifier (in Japanese) Hiroo Sekiya, Takayuki Watanabe, Tadashi Suetsugu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, vol.EE 2007-43, pp.51-56, Nov. 2007. [Abstract | pdf] Design of class DE amplifier with nonlinear shunt capacitance with any output Q (in Japanese) Tooru Ezawa, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 20th Workshop on Circuits and Systems in Karuizawa, pp.423-428, Apr. 2007. [Abstract | pdf] A interleaved phase controll class E^2 dc/dc converter (in Japanese) Motoki Katayama, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 20th Workshop on Circuits and Systems in Karuizawa, pp.441 - 446, Apr. 2007. [Abstract | pdf] Imprementation of design tool for class E switching circiuts using SPICE (in Japanese) Hiroo Sekiya, Tooru Ezawa, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2007-04, pp.37-42, Apr. 2007. [Abstract | pdf] Design of class DE amplifier with nonlinear shunt capacitance with any output Q (in Japanese) Tooru Ezawa, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, vol.106, no.562, pp.41-46, Feb. 2007. [Abstract | pdf] Numerical calculation method for class E switching circuit (in Japanese) Tooru Ezawa, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, pp.59-64, Jan. 2007. [Abstract | pdf] Design and evaluation of class DE inverter with band-pass filter (in Japanese) Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, pp.133-138, Jan. 2007. [Abstract | pdf] Design of class DE amplifire with nonliear capacitance (in Japanese) Takayuki Watanabe, Hiroo Sekiya, Tadashi Suetsugu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2006-120, pp.51-56, Jan. 2007. [Abstract | pdf] Analysis of class DE amplifire with nonliear capacitance (in Japanese) Hiroo Sekiya, Takayuki Watanabe, Tadashi Suetsugu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, pp.39-44, Dec. 2006. [Abstract | pdf] Analysis of class DE ampifier outside optimum condition (in Japanese) Takahiro Negishi, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 19th Workshop on Circuits and Systems in Karuizawa, pp.319 - 324, Apr. 2006. [Abstract | pdf] Design of class DE amplifier with band pass filter (in Japanese) Motoki Katayama, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 19th Workshop on Circuits and Systems in Karuizawa, pp.331-336, Apr. 2006. [Abstract | pdf] Exparimental invetigation of phase controlled class E^2 dc/dc converter (in Japanese) Tsutomu Asano, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, pp.123-128, Jan. 2006. [Abstract | pdf] Operation of class DE amplifier outside optimum conditions (in Japanese) Takahiro Negishi, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, pp.65-70, Jan. 2006. [Abstract | pdf] Design of generalized class E amplifier with nonlinear shunt capacitance (in Japanese) Yoji Arifuku, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi The 18th Workshop on Circuits and Systems in Karuizawa, pp.299-304, Apr. 2005. [Abstract | pdf] Resonant dc/dc converter with class E oscillator (in Japanese) Hiroyuki Hase, Hiroo Sekiya, Jianming Lu and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.104, no.584, pp.1-6, Jan. 2005. [Abstract | pdf] Design of generalized class E amplifier with nonlinear shunt capacitance (in Japanese) Yoji Arifuku, Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, no.NLP2004-99, Jan. 2005. [Abstract | pdf] Design of MOSFET class E oscillator with any design specification (in Japanese) Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, Takashi Yahagi The 17th Workshop on Circuits and Systems in Karuizawa, pp.1-6, Apr. 2004. [Abstract | pdf] Novel design method for electronic circuits with periodic waveforms (in Japanese) Hiroo Sekiya, Yuichi Tanji, Jianming Lu, and Takashi Yahagi The 17th Workshop on Circuits and Systems in Karuizawa, Apr. 2004. [Abstract | pdf] Novel design method for electronic circuits with periodic waveforms (in Japanese) Hiroo Sekiya, Yuichi Tanji, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2003-185, pp.49-54, Mar. 2004. [Abstract | pdf] A Design of MOSFET class E oscillator with any design specification (in Japanese) Hiroyuki Hase, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2003-152, Jan. 2004. [Abstract | pdf] Phase control for resonant dc/dc converter with class DE inverter and class E rectifier (in Japanese) Shuichi Nemoto, Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, vol.NLP2003-11, pp.1-6, June 2003. [Abstract | pdf] Design of class DE amplifier with any output Q, any duty ratio and switch on resistance Satoki Oshikawa, Hiroo Sekiya, Jianming Lu, and Takashi Yahag 16th Workshop of Circuits and Systems at Karuizawa, pp.351-356, Apr. 2003. [Abstract | pdf] Design of class DE-E dc/dc converters with any output Q of the inverter, any duty ratio and switch on resistance (in Japanese) Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Nonlinear Problems, pp.7-12, Feb. 2003. [Abstract | pdf] Design of generalized class E^2 dc/dc converter (in Japanese) Hiroo Sekiya, Jianming Lu, and Takashi Yahagi IEICE Technical Committee on Energy Engineering in Electronics and Communication, pp.33-40, Sept. 2001. 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