2.1 Times increase of drain efficiency by dual supply voltage scheme in 315MHz class-F Power amplifier at output power of -20dBm. - Shunta Iguchi; Akira Saito; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (ESSCIRC, 2012)

An all 0.5V, 1Mbps, 315MHz OOK transceiver with 38-µW career-frequency-free intermittent sampling receiver and 52-µW class-F transmitter in 40-nm CMOS. - Akira Saito; Kentaro Honda; Yun Fei Zheng; Shunta Iguchi; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (VLSIC, 2012)

315MHz OOK transceiver with 38-µW receiver and 36-µW transmitter in 40-nm CMOS. - Shunta Iguchi; Akira Saito; Kentaro Honda; Yun Fei Zheng; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (ASP-DAC, 2013)

92% start-up time reduction by variation-tolerant chirp injection (CI) and negative resistance booster (NRB) in 39MHz crystal oscillator. - Shunta Iguchi; Hiroshi Fuketa; Takayasu Sakurai; Makoto Takamiya (VLSIC, 2014)

Design Method of Class-F Power Amplifier With Output Power of -20 dBm and Efficient Dual Supply Voltage Transmitter. - Shunta Iguchi; Akira Saito; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (IEEE Trans. Circuits Syst. I Regul. Pap., 2014)

Wireless Power Transfer With Zero-Phase-Difference Capacitance Control. - Shunta Iguchi; Pyungwoo Yeon; Hiroshi Fuketa; Koichi Ishida; Takayasu Sakurai; Makoto Takamiya (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

5.7 A 39.25MHz 278dB-FOM 19µW LDO-free stacked-amplifier crystal oscillator (SAXO) operating at I/O voltage. - Shunta Iguchi; Takayasu Sakurai; Makoto Takamiya (ISSCC, 2016)

Variation-Tolerant Quick-Start-Up CMOS Crystal Oscillator With Chirp Injection and Negative Resistance Booster. - Shunta Iguchi; Hiroshi Fuketa; Takayasu Sakurai; Makoto Takamiya (IEEE J. Solid State Circuits, 2016)

Luciola: A Millimeter-Scale Light-Emitting Particle Moving in Mid-Air Based On Acoustic Levitation and Wireless Powering. - Yuki Uno; Hao Qiu; Toru Sai; Shunta Iguchi; Yota Mizutani; Takayuki Hoshi; Yoshihiro Kawahara; Yasuaki Kakehi; Makoto Takamiya (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2017)

A Low-Power CMOS Crystal Oscillator Using a Stacked-Amplifier Architecture. - Shunta Iguchi; Takayasu Sakurai; Makoto Takamiya (IEEE J. Solid State Circuits, 2017)

Luciola: a light-emitting particle moving in mid-air based on ultrasonic levitation and wireless powering. - Hao Qiu; Yuki Uno; Toru Sai; Shunta Iguchi; Yota Mizutani; Takayuki Hoshi; Yoshihiro Kawahara; Yasuaki Kakehi; Makoto Takamiya (SIGGRAPH ASIA Emerging Technologies, 2018)