A 1.9-GHz-band GaAs direct-quadrature modulator IC with a phase shifter. - Kazuya Yamamoto; Kosei Maemura; Naoto Andoh; Yasuo Mitsui (IEEE J. Solid State Circuits, 1993)

A single-chip GaAs RF transceiver for 1.9-GHz digital mobile communication systems. - Kazuya Yamamoto; Kosei Maemura; Nobuyuki Kasai; Yutaka Yoshii; Yukio Miyazaki; Masatoshi Nakayama; Noriko Ogata; Tadashi Takagi; Mutsuyuki Otsubo (IEEE J. Solid State Circuits, 1996)

Design and Experimental Results of a 2V-Operation Single-Chip GaAs T/R-MMIC Front-End for 1.9-GHz Personal Communications. - Kazuya Yamamoto; Takao Moriwaki; Yutaka Yoshii; Takayuki Fujii; Jun Otsuji; Yoshinobu Sasaki; Yukio Miyazaki; Kazuo Nishitani (ASP-DAC, 1998)

A 2.2-V operation, 2.4-GHz single-chip GaAs MMIC transceiver for wireless applications. - Kazuya Yamamoto; Takao Moriwaki; Takayuki Fujii; Jun Otsuji; Miyo Miyashita; Yukio Miyazaki; Kazuo Nishitani (IEEE J. Solid State Circuits, 1999)

A 3.2-V operation single-chip dual-band AlGaAs/GaAs HBT MMIC power amplifier with active feedback circuit technique. - Kazuya Yamamoto; Satoshi Suzuki; Kazutomi Mori; Tomoyuki Asada; Toshio Okuda; Akira Inoue; Takeshi Miura; Kenichiro Chomei; Ryo Hattori; Masahide Yamanouchi; Teruyuki Shimura (IEEE J. Solid State Circuits, 2000)

A 2.4-GHz-band 1.8-V operation single-chip Si-CMOS T/R-MMIC front-end with a low insertion loss switch. - Kazuya Yamamoto; Tetsuya Heima; Akihiko Furukawa; Masayoshi Ono; Yasushi Hashizume; Hiroshi Komurasaki; Shigenobu Maeda; Hisayasu Sato; Naoyuki Kato (IEEE J. Solid State Circuits, 2001)

2.4-GHz-Band CMOS RF Front-End Building Blocks at a 1.8-V Supply. - Hiroshi Komurasaki; Kazuya Yamamoto; Hideyuki Wakada; Tetsuya Heima; Akihiko Furukawa; Hisayasu Sato; Takahiro Miki; Naoyuki Kato; Akira Hyogo; Keitaro Sekine (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

A 1.8-V operation RF CMOS transceiver for 2.4-GHz-band GFSK applications. - Hiroshi Komurasaki; Tomohiro Sano; Tetsuya Heima; Kazuya Yamamoto; Hideyuki Wakada; Ikuo Yasui; Masayoshi Ono; Toshitsugu Miwa; Hisayasu Sato; Takahiro Miki; Naoyuki Kato (IEEE J. Solid State Circuits, 2003)

A GSM/EDGE Dual-Mode, Triple-Band InGaP HBT MMIC Power Amplifier Module. - Teruyuki Shimura; Tomoyuki Asada; Satoshi Suzuki; Takeshi Miura; Jun Otsuji; Ryo Hattori; Yukio Miyazaki; Kazuya Yamamoto; Akira Inoue (IEICE Trans. Electron., 2005)

A 1.8-V operation 5-GHz-band CMOS frequency doubler using current-reuse circuit design technique. - Kazuya Yamamoto (IEEE J. Solid State Circuits, 2005)

3.5-GHz-Band Low-Bias-Current Operation 0/20-dB Step Linearized Attenuators Using GaAs-HBT Compatible, AC-Coupled, Stack Type Base-Collector Diode Switch Topology. - Kazuya Yamamoto; Miyo Miyashita; Nobuyuki Ogawa; Takeshi Miura; Teruyuki Shimura (IEICE Trans. Electron., 2007)

A CDMA InGaP/GaAs-HBT MMIC Power Amplifier Module Operating With a Low Reference Voltage of 2.4 V. - Kazuya Yamamoto; Takao Moriwaki; Hiroyuki Otsuka; Nobuyuki Ogawa; Kosei Maemura; Teruyuki Shimura (IEEE J. Solid State Circuits, 2007)

A Double Image Acquisition System with Visible and UV LEDs for Citrus Fruit. - Mitsutaka Kurita; Naoshi Kondo; Hiroshi Shimizu; Peter Ling; Paolo D. Falzea; Tomoo Shiigi; Kazunori Ninomiya; Takahisa Nishizu; Kazuya Yamamoto (J. Robotics Mechatronics, 2009)

An LED-Based Spectral Imaging System for Surface Reflectance and Normal Estimation. - Keita Hirai; Tetsushi Tanimoto; Kazuya Yamamoto; Takahiko Horiuchi; Shoji Tominaga (SITIS, 2013)

A Current-Mirror-Based GaAs-HBT RF Power Detector Suitable for Base Terminal Monitoring in an HBT Power Stage. - Kazuya Yamamoto; Hitoshi Kurusu; Miyo Miyashita; Satoshi Suzuki; Hiroaki Seki (IEICE Trans. Electron., 2015)

A 3.5-GHz-Band GaAs HBT Stage-Bypass-Type Step-Gain Amplifier Using Base-Collector Diode Switches and Its Application to a WiMAX HBT MMIC Power Amplifier Module. - Kazuya Yamamoto; Miyo Miyashita; Hitoshi Kurusu; Yoshinobu Sasaki; Satoshi Suzuki; Hiroaki Seki (IEICE Trans. Electron., 2015)

0.8-/1.5-GHz-Band WCDMA HBT MMIC Power Amplifiers with an Analog Bias Control Scheme. - Kazuya Yamamoto; Takayuki Matsuzuka; Miyo Miyashita; Kenichi Maeda; Satoshi Suzuki; Hiroaki Seki (IEICE Trans. Electron., 2015)

Mobilization, Flexibility of Identity, and Ethnic Cleavage. - Kazuya Yamamoto (J. Artif. Soc. Soc. Simul., 2015)

Design and Measurements of Building Blocks Supporting a 1.9-GHz-Band BiFET MMIC Power Amplifier for WCDMA Handsets. - Kazuya Yamamoto; Takayuki Matsuzuka; Miyo Miyashita; Kenichi Horiguchi; Shigeo Yamabe; Satoshi Suzuki; Hiroaki Seki (IEICE Trans. Electron., 2016)

Machine vision based soybean quality evaluation. - Momin M. Abdul; Kazuya Yamamoto; Munenori Miyamoto; Naoshi Kondo; Tony E. Grift (Comput. Electron. Agric., 2017)

Experimental Study on CDMA GaAs HBT MMIC Power Amplifier Layout Design for Reducing Turn-On Delay in Transient Response. - Kazuya Yamamoto; Miyo Miyashita; Takayuki Matsuzuka; Tomoyuki Asada; Kazunobu Fujii; Satoshi Suzuki; Teruyuki Shimura; Hiroaki Seki (IEICE Trans. Electron., 2017)

Design and Measurements of Two-Gain-Mode GaAs-BiFET MMIC Power Amplifier Modules with Small Phase Discontinuity for WCDMA Data Communications. - Kazuya Yamamoto; Miyo Miyashita; Kenji Mukai; Shigeru Fujiwara; Satoshi Suzuki; Hiroaki Seki (IEICE Trans. Electron., 2018)

A Ku-band 70-W Class GaN Internally Matched High Power Amplifier with Wide Offset Frequencies of up to 400 MHz for Multi-Carrier Satellite Communications. - Takaaki Yoshioka; Kenji Harauchi; Takumi Sugitani; Takashi Yamasaki; Hiroaki Ichinohe; Miyo Miyashita; Kazuya Yamamoto; Seiki Goto (BCICTS, 2020)

Building a Firefighting Training System in MR. - Kazuya Yamamoto; Makio Ishihara (HCI (49), 2020)

3D Modeling and 3D Materialization of Fluid Art that Occurs in Very Short Time. - Naoko Tosa; Yunian Pang; Ryohei Nakatsu; Akihiro Yamada; Takashi Suzuki; Kazuya Yamamoto (ICEC, 2020)

Ku-Band 70-/30-W-Class Internally Matched GaN Power Amplifiers With Low IMD3 Over a Wide Offset Frequency Range of Up To 400 MHz. - Takaaki Yoshioka; Kenji Harauchi; Takumi Sugitani; Hiroaki Maehara; Takashi Yamasaki; Hiroaki Ichinohe; Miyo Miyashita; Kazuya Yamamoto; Seiki Goto (IEEE J. Solid State Circuits, 2021)

Foreword. - Kazuya Yamamoto (IEICE Trans. Electron., 2022)

GNN-Opt: Enhancing Automated Circuit Design Optimization with Graph Neural Networks. - Kazuya Yamamoto; Nobukazu Takai (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2025)