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Yasuyuki OKUMA

0.5-V Input Digital Low-Dropout Regulator (LDO) with 98.7% Current Efficiency in 65 nm CMOS Yasuyuki OKUMA Koichi ISHIDA Yoshikatsu RYU Xin ZHANG Po-Hung CHEN Kazunori WATANABE Makoto TAKAMIYA Takayasu SAKURAI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/06/01 Vol. E94-C No. 6 pp. 938-944 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: low dropout regulator, digital control, low voltage,
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A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage Xin ZHANG Yu PU Koichi ISHIDA Yoshikatsu RYU Yasuyuki OKUMA Po-Hung CHEN Takayasu SAKURAI Makoto TAKAMIYA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/06/01 Vol. E94-C No. 6 pp. 953-959 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: DC-DC converter, low ripple, low voltage, pulse density modulation, pulse width modulation, switched-capacitor,
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0.18-V Input Charge Pump with Forward Body Bias to Startup Boost Converter for Energy Harvesting Applications Po-Hung CHEN Koichi ISHIDA Xin ZHANG Yasuyuki OKUMA Yoshikatsu RYU Makoto TAKAMIYA Takayasu SAKURAI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/04/01 Vol. E94-C No. 4 pp. 598-604 Type of Manuscript: Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration) Category: Keyword: charge pumps, switched capacitor, startup, boost converter, low voltage,
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0.7-GHz-Bandwidth DS-UWB-IR System for Low-Power Wireless Communications Ryosuke FUJIWARA Akira MAEKI Kenichi MIZUGAKI Goichi ONO Tatsuo NAKAGAWA Takayasu NORIMATSU Masaru KOKUBO Masayuki MIYAZAKI Yasuyuki OKUMA Miki HAYAKAWA Shinsuke KOBAYASHI Noboru KOSHIZUKA Ken SAKAMURA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2008/02/01 Vol. E91-B No. 2 pp. 518-526 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: impulse radio, LR-WPAN, UWB, wireless sensor networks,
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+3 V/-3 V Operation 1.2 Gbps Write Driver for Hard Disk Drives Yasuyuki OKUMA Kenji MAIO Hiroyasu YOSHIZAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2004/04/01 Vol. E87-C No. 4 pp. 578-581 Type of Manuscript: Special Section PAPER (Special Section on Low-Power System LSI, IP and Related Technologies) Category: Keyword: low-voltage, hard disk drive, write driver,
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