Keishi Tsubaki

A 32.55-kHz, 472-nW, 120ppm/°C, fully on-chip, variation tolerant CMOS relaxation oscillator for a real-time clock application

Keishi Tsubaki, Tetsuya Hirose, Nobutaka Kuroki et al. · 2013 · 36 citations

Low-power Electronics, Ultra-low Power, Compensation Architecture +8

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 et al. · 2014 · 21 citations

Engineering, Energy Efficiency, Energy Conversion +16

A 18.9-nA standby current comparator with adaptive bias current generator

Isono Kosuke, Tetsuya Hirose, Keishi Tsubaki et al. · 2011 · 16 citations

Low-power Electronics, Electrical Engineering, Engineering +4

A Highly Efficient Switched-Capacitor Voltage Boost Converter with Nano-Watt MPPT Controller for Low-Voltage Energy Harvesting

Toshihiro Ozaki, Tetsuya Hirose, Takahiro Nagai et al. · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2016 · 16 citations

Low-power Electronics, Electrical Engineering, Energy Harvesting +14

A 6.66-kHz, 940-nW, 56ppm/°C, fully on-chip PVT variation tolerant CMOS relaxation oscillator

Keishi Tsubaki, Tetsuya Hirose, Yuji Osaki et al. · 2012 · 12 citations

Low-power Electronics, Electrical Engineering, Engineering +9