Yi Tan and Hiroki Ishikuro, “A Switched-Capacitor DC-DC Converter with > 77.3% Efficiency and 80 ns Active Transient Response in 40 μA – 4 mA Load Current Range,” IEEE 47th European Solid-State Circuits Conference (ESSCIRC), Sept. 13-17, 2021.

Yuya Fuketa, Kohei Tatehora, Yohsuke Shiiki, Shuya Nakagawa, and Hiroki Ishikuro, “A Fast Wake-Up and High Accuracy Sensor Interface by Synchronous Sampling with Power-Efficient Switching Regulator,” 2021 IEEE 64th International Midwest Symposium on Circuits and Systems (MWSCAS), Aug. 9-11, 2021.

Peter Toth and Hiroki Ishikuro, “An up to 35dBc/Hz Phase Noise Improving Design Methodology for Differential-Ring-Oscillators Applied in Ultra-Low Power Systems,” 26th Asia and South Pacific Design Automation Conference (ASP-DAC), pp. 9-10, Jan., 2021.

Yi Tan, Yohsuke Shiiki, and Hiroki Ishikuro, “Gate Voltage Optimization in Capacitive DC-DC Converters for Thermoelectric Energy Harvesting,” 26th Asia and South Pacific Design Automation Conference (ASP-DAC), pp. 11-12, Jan., 2021.

Peter Toth and Hiroki Ishikuro, “An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept,” 26th Asia and South Pacific Design Automation Conference (ASP-DAC), pp. 105-106, Jan., 2021.

Yuya Maekawa, Syuya Nakagawa, and Hiroki Ishikuro , “A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC,” IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), Dec., 2020

Peter Toth, Hiroki Ishikuro, “Wide Input-Range, Low-Power and Highly Flexible18 Bit Time-to-Digital Converter with CompactDifferential Circuit Topology,” MWSCAS, Springfield, MA, USA, August 9th-12th, 2020

Yi Tan, Yohsuke Shiiki, Hiroki Ishikuro, “A 0.12V Fully Integrated Charge Pump with Gate Voltage Optimization for Energy Harvesting Applications,” IEEE ISCAS, Seville, Spain, Oct. 11-14 (2020)

Kohei Tatehora, Yohsuke Shiiki, Shuya Nakagawa, Takahisa Tanaka, Ken Uchida, Hiroki Ishikuro, “A Wide Range and High Accuracy Sensor Interface with Switching Regulator for Coin-Cell Powered Tiny Wireless Sensor Node,” IEEE ISCAS, Seville, Spain, Oct. 11-14 (2020)

Shuya Nakagawa, Takumi Miyazaki, and Hiroki Ishikuro, “A High-Resolution Oscillator Based Resistance-to-Digital Converter with Non-Linearity Cancelling Feedback by ΔΣ Modulated Variable Resistor,” IEEE ISCAS, Seville, Spain, Oct. 11-14 (2020)