A Class D Type High Frequency Tuned Power Amplifier with Class E Switching Conditions. - Hirotaka Koizumi; Minoru Iwadare; Shinsaku Mori; Kazunaga Ikeda (ISCAS, 1994)

Resonant dc/dc Converter with Class E Inverter and Class E Synchronous Rectifier Using Thinned-Out Method. - Motoki Fujii; Tadashi Suetsugu; Hirotaka Koizumi; Kokichi Shinoda; Shinsaku Mori (ISCAS, 1995)

New resonant DC/DC converter with Class de inverter and Class E Rectifier. - Hirotaka Koizumi; Motoki Fujii; Tadashi Suetsugu; Shinsaku Mori (J. Circuits Syst. Comput., 1995)

Consistency of Natural Relations on Sets. - Akira Maruoka; Mike Paterson; Hirotaka Koizumi (Comb. Probab. Comput., 1998)

New control scheme for class DE inverter by varying driving signals. - Hiroo Sekiya; Mitsuhiro Matsuo; Hirotaka Koizumi; Shinsaku Mori; Iwao Sasase (IEEE Trans. Ind. Electron., 2000)

Design of a generalized phase-controlled class E inverter. - Daisuke Kawamoto; Hiroo Sekiya; Hirotaka Koizumi; Iwao Sasase (ISCAS (3), 2001)

FM/PWM control scheme on class DE inverter for keeping high power conversion efficiency. - Hiroo Sekiya; Hirotaka Koizumi; Shinsaku Mori; Iwao Sasase (ISCAS (3), 2001)

Analysis of Class D-E Resonant dc/dc Converter Using Thinned-Out Method. - Hirotaka Koizumi; Iwao Sasase; Shinsaku Mori (J. Circuits Syst. Comput., 2002)

Design of phase-controlled class E inverter with asymmetric circuit configuration. - Daisuke Kawamoto; Hiroo Sekiya; Hirotaka Koizumi; Iwao Sasase; Shinsaku Mori (IEEE Trans. Circuits Syst. II Express Briefs, 2004)

FM/PWM control scheme in class DE inverter. - Hiroo Sekiya; Hirotaka Koizumi; Shinsaku Mori; Iwao Sasase; Jianming Lu; Takashi Yahagi (IEEE Trans. Circuits Syst. I Regul. Pap., 2004)

Thinned-out controlled class D inverter with delta-sigma modulated 1-bit driving pulses. - Hirotaka Koizumi; Kosuke Kurokawa; Shinsaku Mori (ISCAS (2), 2005)

A comparison of output envelope waveforms of the delta-sigma modulated class D series resonant inverter. - Hirotaka Koizumi; Kosuke Kurokawa; Shinsaku Mori (ISCAS, 2006)

Analysis of class D inverter with irregular driving patterns. - Hirotaka Koizumi; Kosuke Kurokawa; Shinsaku Mori (IEEE Trans. Circuits Syst. I Regul. Pap., 2006)

A Novel Microcontroller for Grid-Connected Photovoltaic Systems. - Hirotaka Koizumi; Tamaki Mizuno; Takashi Kaito; Yukihisa Noda; Norio Goshima; Manabu Kawasaki; Ken Nagasaka; Kosuke Kurokawa (IEEE Trans. Ind. Electron., 2006)

Class DE Inverter with Asymmetric Shunt Capacitors. - Hirotaka Koizumi; Kosuke Kurokawa (ISCAS, 2007)

Analysis of the Class DE Inverter With Thinned-Out Driving Patterns. - Hirotaka Koizumi; Kosuke Kurokawa (IEEE Trans. Ind. Electron., 2007)

Delta-sigma modulated class D ZCS series resonant inverter with an inductive load. - Hirotaka Koizumi (ISCAS, 2008)

A voltage equalizer applying a charge pump for energy storage systems. - Tomoshige Inoue; Hirotaka Koizumi (ECCTD, 2009)

Influence of Junction Capacitance of Switching Devices on Class E Rectifier. - Keiichi Sakuma; Hirotaka Koizumi (ISCAS, 2009)

A switched-capacitor inverter using series/parallel conversion. - Youhei Hinago; Hirotaka Koizumi (ISCAS, 2010)

A Single-Phase Multilevel Inverter Using Switched Series/Parallel DC Voltage Sources. - Youhei Hinago; Hirotaka Koizumi (IEEE Trans. Ind. Electron., 2010)

A common grounded Z-source buck-boost converter. - Masato Asano; Daiki Abe; Hirotaka Koizumi (ISCAS, 2011)

Half-wave Class DE Low dv/dt rectifier. - Kazuaki Fukui; Hirotaka Koizumi (APCCAS, 2012)

A voltage equalizer using flyback converter with active clamp. - Tomoyuki Mizuno; Tomoshige Inoue; Keisuke Iwasawa; Hirotaka Koizumi (APCCAS, 2012)

Development of three-phase to single-phase matrix converter for improvement of three-phase voltage unbalance in distribution system. - Ryota Mizutani; Hirotaka Koizumi; Eiji Kamiya; Kentaro Hirose (APCCAS, 2012)

Zero current switching Type Class DE rectifier. - Tsukasa Misawa; Kazuaki Fukui; Hirotaka Koizumi (IECON, 2012)

A Switched-Capacitor Inverter Using Series/Parallel Conversion With Inductive Load. - Youhei Hinago; Hirotaka Koizumi (IEEE Trans. Ind. Electron., 2012)

Bidirectional chopper using cell voltage equalizing with flyback transformer. - Tasuku Anno; Hirotaka Koizumi (IECON, 2013)

Three-level buck-boost dc-dc converter with voltage-lift-type switched-inductor. - Kyohei Fukuda; Hirotaka Koizumi (IECON, 2013)

Double-tiered switched capacitor battery charge equalizer with chain structure. - Ryohei Fukui; Hirotaka Koizumi (IECON, 2013)

High-step-up dc-dc converter using voltage multiplier cell with ripple free input current. - Ryuga Hosoki; Hirotaka Koizumi (IECON, 2013)

Interleaved soft-switching multilevel boost converter. - Koichi Matsumura; Hirotaka Koizumi (IECON, 2013)

Quasi-Z-source dc-dc converter with voltage-lift technique. - Taro Takiguchi; Hirotaka Koizumi (IECON, 2013)

Multistage class DE current driven low di/dt rectifier. - Yutaro Minami; Hirotaka Koizumi (IECON, 2014)

Modularized LC resonant switched capacitor cell voltage equalizer. - Takuya Ohno; Takahumi Suzuki; Hirotaka Koizumi (IECON, 2014)

Bidirectional cascaded quasi-Z-source DC-DC converter. - Takaharu Sato; Takayuki Shimo; Taro Takiguchi; Hirotaka Koizumi (IECON, 2014)

Class DE current driven low di/dt rectifier. - Yutaro Minami; Hirotaka Koizumi (ISCAS, 2014)

A design method for single phase Z-source inverter. - Sho Takeuchi; Naoki Yamashita; Hirotaka Koizumi (ISCAS, 2014)

Level- and Phase-Shifted PWM for Seven-Level Switched-Capacitor Inverter Using Series/Parallel Conversion. - Asuka Tsunoda; Youhei Hinago; Hirotaka Koizumi (IEEE Trans. Ind. Electron., 2014)

Ripple free operation of two-stage boost type DC-DC converter. - Ryuga Hosoki; Shuhei Kinjo; Hirotaka Koizumi (IECON, 2015)

MPPT controled piezoelectric energy harvesting circuit using synchronized switch harvesting on inductor. - Naoki Kawai; Yukito Kushino; Hirotaka Koizumi (IECON, 2015)

Class DE voltage-source parallel resonant inverter. - Takeshi Kondo; Hirotaka Koizumi (IECON, 2015)

Interleaved soft-switching multilevel boost converter with coupled inductor. - Taro Takiguchi; Koichi Furukawa; Koichi Matsumura; Hirotaka Koizumi (IECON, 2015)

A high step-up DC-DC converter using transformer with intrinsic voltage-doubler. - Koichi Furukawa; Taro Takiguchi; Ryuga Hosoki; Hirotaka Koizumi (ISCAS, 2015)

A study on effect of blocking and bypass diodes on partial shaded PV string with compensating circuit using voltage equalizer. - Kota Kato; Hirotaka Koizumi (ISCAS, 2015)

Class DE voltage driven low dv/dt Rectifier with switch-controlled capacitor. - Tsuyoshi Inaba; Akifumi Nakamura; Hirotaka Koizumi (IECON, 2016)

A bridgeless buck AC-DC converter for piezoelectric energy harvesting. - Yuta Kizu; Kunihisa Okano; Hirotaka Koizumi (IECON, 2016)

Modularized chain structure of switched capacitor for cell voltage equalizer with T-connected bi-directional switch. - Tomoaki Shimizu; Hirotaka Koizumi (ISCAS, 2016)

A single-input dual-output rectifier for piezoelectric energy harvesting. - Yuta Kizu; Hirotaka Koizumi (IECON, 2017)

Piezoelectric energy harvesting circuit using full-wave voltage doubling rectifier type series-synchronized switch harvesting on inductor. - Yoshki Ochi; Hirotaka Koizumi (IECON, 2017)

Current-source parallel resonant class E inverter with low peak switch current. - Akinobu Shigeno; Takashi Shimizu; Hirotaka Koizumi (IECON, 2017)

A thermoelectric energy harvesting system with bridgeless boost/buck-boost rectifier. - Keita Taeda; Norihiro Shiina; Keisuke Kimura; Hirotaka Koizumi (IECON, 2017)

Modularized double-tiered switched capacitor voltage equalizer. - Yuma Takeda; Hirotaka Koizumi (IECON, 2017)

A hybrid nine-level inverter with series/parallel conversion. - Yuya Nakagawa; Hirotaka Koizumi (ISCAS, 2017)

Class D Series-Resonant DC/DC Converter Using Switch-Controlled Capacitor with ON-OFF Feedback Control. - Taro Takamori; Tomoyuki Mannen; Hirotaka Koizumi (IECON, 2018)

A Wireless Sensor Node Driving System with Bridgeless Bipolar Boost Rectifier Using Thermoelectric Energy Harvesting. - Keisuke Kimura; Keita Taeda; Shohei Niikawa; Hirotaka Koizumi (ISCAS, 2018)

Half-Wave Class DE Low dv/dt Rectifier Using Common-Grounded Controlled Shunt Capacitor and Its Design Approach. - Yoshikazu Sakai; Hirotaka Koizumi (ISCAS, 2018)

A Common Ground Five-Level Inverter Using Switched Capacitor. - Kazunori Ito; Koki Takahashi; Hirotaka Koizumi (IECON, 2019)

Voltage-Source Parallel Resonant Class DE Inverter With Shunt Capacitor. - Yuma Mitsusada; Hirotaka Koizumi (IECON, 2019)

Two-Stage Interleaved DC-DC Converter with Input-Parallel Output-Series Connection. - Atsushi Matsuda; Hirotaka Koizumi; Takaharu Sato (ISCAS, 2019)

Class-E2 DC-DC Converter With Basic Class-E Inverter and Class-E ZCS Rectifier for Capacitive Power Transfer. - Hayato Ueda; Hirotaka Koizumi (IEEE Trans. Circuits Syst. II Express Briefs, 2020)

Voltage-Source Parallel Resonant Class E Oscillator. - Takeru Kurumizawa; Hirotaka Koizumi (ISCAS, 2021)

HERIC Based PV Inverter Using Partial Sinewave Tracking Dual Mode Control. - Kazunori Ito; Hirotaka Koizumi (ISCAS, 2022)

Load-Independent Class E2 Parallel Resonant DC-DC Converter. - Tomohiro Sensui; Hirotaka Koizumi (IEEE Trans. Circuits Syst. II Express Briefs, 2022)

Load-Independent Class E-1 Capacitive Isolated Inverter with Shunt Capacitance. - Shizuna Oshima; Hirotaka Koizumi (IECON, 2023)

Fault-Tolerant Active Neutral-Point-Clamped Multilevel Inverter Maintaining Output Voltage at Failure. - Jun Hitokuwata; Hirotaka Koizumi (ISIE, 2023)

Choke-less Class-E Oscillator Using p-MOSFET and n-MOSFET. - Yuta Ikutajima; Hirotaka Koizumi (ISIE, 2023)

Load-Independent Class E-1 Voltage-Driven Synchronous Rectifier. - Shizuna Oshima; Hirotaka Koizumi (ISIE, 2023)

Capacitive Power Transfer System Using a Load-Independent Class E Zero Voltage Switching Parallel Resonant Inverter and a Class D Voltage-Driven Rectifier. - Kazuma Shinde; Hirotaka Koizumi (IEEE Trans. Circuits Syst. II Express Briefs, 2024)

A Multi-Load Capacitive Power Transfer System Using Class-E Inverter. - Kurumi Chika; Wenqi Zhu; Hirotaka Koizumi (ISCAS, 2025)

Load-Independent Class-E Rectifier with Variable Gain and Fixed Input Reactance. - Wenqi Zhu; Hirotaka Koizumi; Ayano Komanaka; Yutaro Komiyama; Hiroo Sekiya (ISCAS, 2025)