A 0.21-V minimum input, 73.6% maximum efficiency, fully integrated voltage boost converter with MPPT for low-voltage energy harvesters. - Toshihiro Ozaki; Tetsuya Hirose; Takahiro Nagai; Keishi Tsubaki; Nobutaka Kuroki; Masahiro Numa (ESSCIRC, 2014)

A 0.21-V minimum input, 73.6% maximum efficiency, fully integrated 3-terminal voltage converter with MPPT for low-voltage energy harvesters. - Toshihiro Ozaki; Tetsuya Hirose; Takahiro Nagai; Keishi Tsubaki; Nobutaka Kuroki; Masahiro Numa (ASP-DAC, 2015)

A fully-integrated, high-conversion-ratio and dual-output voltage boost converter with MPPT for low-voltage energy harvesting. - Toshihiro Ozaki; Tetsuya Hirose; Hiroki Asano; Nobutaka Kuroki; Masahiro Numa (A-SSCC, 2015)

A 0.38-μW stand-by power, 50-nA-to-1-mA load current range DC-DC converter with self-biased linear regulator for ultra-low power battery management. - Toshihiro Ozaki; Tetsuya Hirose; Hiroki Asano; Nobutaka Kuroki; Masahiro Numa (A-SSCC, 2016)

A 1.66-nW/kHz, 32.7-kHz, 99.5ppm/°C fully integrated current-mode RC oscillator for real-time clock applications with PVT stability. - Hiroki Asano; Tetsuya Hirose; Keishi Tsubaki; Taro Miyoshi; Toshihiro Ozaki; Nobutaka Kuroki; Masahiro Numa (ESSCIRC, 2016)

A fully integrated, 1-µs start-up time, 32-MHz relaxation oscillator for low-power intermittent systems. - Hiroki Asano; Tetsuya Hirose; Taro Miyoshi; Keishi Tsubaki; Toshihiro Ozaki; Nobutaka Kuroki; Masahiro Numa (NEWCAS, 2016)

A Highly Efficient Switched-Capacitor Voltage Boost Converter with Nano-Watt MPPT Controller for Low-Voltage Energy Harvesting. - Toshihiro Ozaki; Tetsuya Hirose; Takahiro Nagai; Keishi Tsubaki; Nobutaka Kuroki; Masahiro Numa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Fully-Integrated High-Conversion-Ratio Dual-Output Voltage Boost Converter With MPPT for Low-Voltage Energy Harvesting. - Toshihiro Ozaki; Tetsuya Hirose; Hiroki Asano; Nobutaka Kuroki; Masahiro Numa (IEEE J. Solid State Circuits, 2016)

Sub-1-μs start-up time, 32-MHz relaxation oscillator for low-power intermittent VLSI systems. - Hiroki Asano; Tetsuya Hirose; Taro Miyoshi; Keishi Tsubaki; Toshihiro Ozaki; Nobutaka Kuroki; Masahiro Numa (ASP-DAC, 2017)

A 0.1-0.6 V input range voltage boost converter with low-leakage driver for low-voltage energy harvesting. - Yuto Tsuji; Tetsuya Hirose; Toshihiro Ozaki; Hiroki Asano; Nobutaka Kuroki; Masahiro Numa (ICECS, 2017)

An area-efficient, 0.022-mm2, fully integrated resistor-less relaxation oscillator for ultra-low power real-time clock applications. - Hiroki Asano; Tetsuya Hirose; Toshihiro Ozaki; Nobutaka Kuroki; Masahiro Numa (ISCAS, 2017)

Synchronizing Method of Music and Movie Clips Considering Temporal Harmony. - Toshihiro Ozaki; Teruhisa Hochin; Hiroki Nomiya (CSII, 2018)

Analytical Study of Multi-stage Switched-Capacitor Voltage Boost Converter for Ultra-low Voltage Energy Harvesting. - Yuichiro Nakazawa; Tetsuya Hirose; Toshihiro Ozaki; Yuto Tsuji; Shuto Kanzaki; Hiroki Asano; Nobutaka Kuroki; Masahiro Numa (ISCAS, 2018)

A Sub-1-µs Start-Up Time, Fully-Integrated 32-MHz Relaxation Oscillator for Low-Power Intermittent Systems. - Hiroki Asano; Tetsuya Hirose; Taro Miyoshi; Keishi Tsubaki; Toshihiro Ozaki; Nobutaka Kuroki; Masahiro Numa (IEICE Trans. Electron., 2018)