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Ryuichi FUJIMOTO

A 120 GHz/140 GHz Dual-Channel OOK Receiver Using 65 nm CMOS Technology Ryuichi FUJIMOTO Mizuki MOTOYOSHI Kyoya TAKANO Minoru FUJISHIMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/02/01 Vol. E96-A No. 2 pp. 486-493 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics) Category: Keyword: millimeter wave, D-band, dual-band, OOK modulation, Receiver, CMOS, BER, data rate, sensitivity, channel selection,
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A 120-GHz Transmitter and Receiver Chipset with 9-Gbps Data Rate Using 65-nm CMOS Technology Ryuichi FUJIMOTO Mizuki MOTOYOSHI Kyoya TAKANO Uroschanit YODPRASIT Minoru FUJISHIMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/07/01 Vol. E95-C No. 7 pp. 1154-1162 Type of Manuscript: Special Section PAPER (Special Section on Recent Trends of Microwave Systems and Their Fundamental Technologies) Category: Keyword: millimeter wave, OOK modulation, transceiver, CMOS,
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A-104 dBc/Hz In-Band Phase Noise 3 GHz All Digital PLL with Phase Interpolation Based Hierarchical Time to Digital Converter Daisuke MIYASHITA Hiroyuki KOBAYASHI Jun DEGUCHI Shouhei KOUSAI Mototsugu HAMADA Ryuichi FUJIMOTO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/06/01 Vol. E95-C No. 6 pp. 1008-1016 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: ADPLL, TDC, phase interpolator, phase noise,
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Bias-Voltage-Dependent Subcircuit Model for Millimeter-Wave CMOS Circuit Kosuke KATAYAMA Mizuki MOTOYOSHI Kyoya TAKANO Ryuichi FUJIMOTO Minoru FUJISHIMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/06/01 Vol. E95-C No. 6 pp. 1077-1085 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: parameter extraction, MOSFET modeling, millimeter wave,
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Analysis of De-Embedding Error Cancellation in Cascade Circuit Design Kyoya TAKANO Ryuichi FUJIMOTO Kosuke KATAYAMA Mizuki MOTOYOSHI Minoru FUJISHIMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/10/01 Vol. E94-C No. 10 pp. 1641-1649 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology) Category: Measurement Techniques Keyword: de-embedding, TRL, cascade circuit,
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A Single-Chip RF Tuner/OFDM Demodulator for Mobile Digital TV Application Yoshimitsu TAKAMATSU Ryuichi FUJIMOTO Tsuyoshi SEKINE Takaya YASUDA Mitsumasa NAKAMURA Takuya HIRAKAWA Masato ISHII Motohiko HAYASHI Hiroya ITO Yoko WADA Teruo IMAYAMA Tatsuro OOMOTO Yosuke OGASAWARA Masaki NISHIKAWA Yoshihiro YOSHIDA Kenji YOSHIOKA Shigehito SAIGUSA Hiroshi YOSHIDA Nobuyuki ITOH
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/04/01 Vol. E94-C No. 4 pp. 557-566 Type of Manuscript: Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration) Category: Keyword: digital TV, 1-segment broadcasting, ISDB-T, tunable, low-noise amplifier, spurious signal, prescaler, PLL,
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Device Modeling Techniques for High-Frequency Circuits Design Using Bond-Based Design at over 100 GHz Ryuichi FUJIMOTO Kyoya TAKANO Mizuki MOTOYOSHI Uroschanit YODPRASIT Minoru FUJISHIMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/04/01 Vol. E94-C No. 4 pp. 589-597 Type of Manuscript: Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration) Category: Keyword: millimeter wave, device model, MOSFET, transmission line, pad, bond-based design,
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A 60-GHz Phase-Locked Loop with Inductor-Less Wide Operation Range Prescaler in 90-nm CMOS Hiroaki HOSHINO Ryoichi TACHIBANA Toshiya MITOMO Naoko ONO Yoshiaki YOSHIHARA Ryuichi FUJIMOTO
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2009/06/01 Vol. E92-C No. 6 pp. 785-791 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: PLL, synthesizer, VCO, ILFD, phase noise,
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A Low-Noise Amplifier for WCDMA Terminal with High Tolerance for Leakage Signal from Transmitter Ryuichi FUJIMOTO Gaku TAKEMURA Masato ISHII Takehiko TOYODA Hiroshi TSURUMI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/02/01 Vol. E91-A No. 2 pp. 521-528 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics) Category: Keyword: low-noise amplifier, LNA, WCDMA, TX leakage signal, noise frequency conversion, noise figure NF,
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A Quadrature Demodulator for WCDMA Receiver Using Common-Base Input Stage with Robustness to Transmitter Leakage Toshiya MITOMO Osamu WATANABE Ryuichi FUJIMOTO Shunji KAWAGUCHI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/06/01 Vol. E90-C No. 6 pp. 1241-1246 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies) Category: Keyword: WCDMA receiver, direct conversion, quadrature demodulator, common-base circuit,
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A Low LO Leakage and Low Power LO Buffer for Direct-Conversion Quadrature Demodulator Toshiya MITOMO Osamu WATANABE Shoji OTAKA Ryuichi FUJIMOTO Shunji KAWAGUCHI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/06/01 Vol. E88-C No. 6 pp. 1212-1217 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit and Device Technologies) Category: RF Keyword: LO buffer, quadrature demodulator, direct-conversion, self mixing, DC offset,
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A Direct Conversion Receiver for W-CDMA Reducing Current Consumption to 31 mA Hiroshi YOSHIDA Takehiko TOYODA Makoto ARAI Ryuichi FUJIMOTO Toshiya MITOMO Masato ISHII Rui ITO Tadashi ARAI Tetsuro ITAKURA Hiroshi TSURUMI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/06/01 Vol. E88-C No. 6 pp. 1271-1274 Type of Manuscript: Special Section LETTER (Special Section on Analog Circuit and Device Technologies) Category: RF Keyword: direct conversion, power consumption, W-CDMA,
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Fully Differential Direct-Conversion Receiver for W-CDMA Reducing DC-Offset Variation Hiroshi YOSHIDA Takehiko TOYODA Ichiro SETO Ryuichi FUJIMOTO Osamu WATANABE Tadashi ARAI Tetsuro ITAKURA Hiroshi TSURUMI
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2004/06/01 Vol. E87-C No. 6 pp. 901-908 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit and Device Technologies) Category: Keyword: direct conversion, DC offset canceler, harmonic mixer,
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A Simple Modeling Technique for Symmetric Inductors Ryuichi FUJIMOTO Chihiro YOSHINO Tetsuro ITAKURA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/06/01 Vol. E86-C No. 6 pp. 1093-1097 Type of Manuscript: Special Section LETTER (Special Issue on Devices and Circuits for Next Generation Multi-Media Communication Systems) Category: Keyword: symmetric inductor, device model parameter, differential mode, common mode,
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A Low Offset 1.9-GHz Direct Conversion Receiver IC with Spurious Free Dynamic Range of over 67 dB Shoji OTAKA Takafumi YAMAJI Ryuichi FUJIMOTO Hiroshi TANIMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/02/01 Vol. E84-A No. 2 pp. 513-519 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques Supporting the System LSI Era) Category: Keyword: direct conversion receiver, double balanced mixer, variable gain amplifier, on-chip balun, 90 phase-shifter,
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High-Frequency Device-Modeling Techniques for RF-CMOS Circuits Ryuichi FUJIMOTO Osamu WATANABE Fumie FUJII Hideyuki KAWAKITA Hiroshi TANIMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/02/01 Vol. E84-A No. 2 pp. 520-528 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques Supporting the System LSI Era) Category: Keyword: device model, model parameter, scaling, geometric parameter, process parameter,
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A 1.9-GHz Direct Conversion Transmitter IC with Low Power On-Chip Frequency Doubler Shoji OTAKA Ryuichi FUJIMOTO Hiroshi TANIMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/02/20 Vol. E82-A No. 2 pp. 313-319 Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics) Category: Keyword: frequency doubler, quadrature modulator, variable attenuator, transmitter, PHS(Personal Handy-Phone System), 90phase-shifter, ECL-EXOR,
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A 1. 5 GHz CMOS Low Noise Amplifier Ryuichi FUJIMOTO Shoji OTAKA Hiroshi IWAI Hiroshi TANIMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1998/03/20 Vol. E81-A No. 3 pp. 382-388 Type of Manuscript: Special Section PAPER (Special Section of Selected Papers from the 10th Karuizawa Workshop on Circuits and Systems) Category: Keyword: low noise amplifier, CMOS technology, short channel, inductor, high frequency circuit,
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1.9 GHz Si Direct Conversion Receiver IC for QPSK Modulation Systems Chikau TAKAHASHI Ryuichi FUJIMOTO Satoshi ARAI Tetsuro ITAKURA Takashi UENO Hiroshi TSURUMI Hiroshi TANIMOTO Shuji WATANABE Kenji HIRAKAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1996/05/20 Vol. E79-C No. 5 pp. 644-649 Type of Manuscript: Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications) Category: Active Devices Keyword: direct conversion receiver, 2nd-order distortion, QPSK,
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A Hierarchical Structure in Homoclinic Bifurcations Ryuichi FUJIMOTO Motomasa KOMURO Ryuji TOKUNAGA Takashi MATSUMOTO
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/06/20 Vol. E73-E No. 6 pp. 809-816 Type of Manuscript: Special Section PAPER (Special Issue on Engineering Chaos) Category: Chaos in Electrical Circuits Keyword:
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