Yoshikatsu Ryu

According to our database, Yoshikatsu Ryu authored at least 14 papers between 2010 and 2014.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2014

A 0.6 V Input CCM/DCM Operating Digital Buck Converter in 40 nm CMOS.

Xin Zhang, Po-Hung Chen, Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya

IEEE J. Solid State Circuits, 2014

2013

A low voltage buck DC-DC converter using on-chip gate boost technique in 40nm CMOS.

Xin Zhang, Po-Hung Chen, Yoshikatsu Ryu, Koichi Ishida, Yasuyuki Okuma, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya

Proceedings of the 18th Asia and South Pacific Design Automation Conference, 2013

2012

A 1-V-Input Switched-Capacitor Voltage Converter With Voltage-Reference-Free Pulse-Density Modulation.

Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya

IEEE Trans. Circuits Syst. II Express Briefs, 2012

An 80 mV Startup Dual-Mode Boost Converter by Charge-Pumped Pulse Generator and Threshold Voltage Tuned Oscillator With Hot Carrier Injection.

Po-Hung Chen, Xin Zhang, Koichi Ishida, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

IEEE J. Solid State Circuits, 2012

Startup Techniques for 95 mV Step-Up Converter by Capacitor Pass-On Scheme and V_TH-Tuned Oscillator With Fixed Charge Programming.

Po-Hung Chen, Koichi Ishida, Katsuyuki Ikeuchi, Xin Zhang, Kentaro Honda, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

IEEE J. Solid State Circuits, 2012

A 0.45-V input on-chip gate boosted (OGB) buck converter in 40-nm CMOS with more than 90% efficiency in load range from 2µW to 50µW.

Xin Zhang, Po-Hung Chen, Yoshikatsu Ryu, Koichi Ishida, Yasuyuki Okuma, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya

Proceedings of the Symposium on VLSI Circuits, 2012

A 120-mV input, fully integrated dual-mode charge pump in 65-nm CMOS for thermoelectric energy harvester.

Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

Proceedings of the 17th Asia and South Pacific Design Automation Conference, 2012

2011

A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage.

Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Takayasu Sakurai, Makoto Takamiya

IEICE Trans. Electron., 2011

0.5-V Input Digital Low-Dropout Regulator (LDO) with 98.7% Current Efficiency in 65 nm CMOS.

Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Xin Zhang, Po-Hung Chen, Kazunori Watanabe, Makoto Takamiya, Takayasu Sakurai

IEICE Trans. Electron., 2011

0.18-V Input Charge Pump with Forward Body Bias to Startup Boost Converter for Energy Harvesting Applications.

Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

IEICE Trans. Electron., 2011

A 95mV-startup step-up converter with Vth-tuned oscillator by fixed-charge programming and capacitor pass-on scheme.

Po-Hung Chen, Koichi Ishida, Katsuyuki Ikeuchi, Xin Zhang, Kentaro Honda, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

Proceedings of the IEEE International Solid-State Circuits Conference, 2011

A 80-mV input, fast startup dual-mode boost converter with charge-pumped pulse generator for energy harvesting.

Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

Proceedings of the IEEE Asian Solid-State Circuits Conference, 2011

2010

0.5-V input digital LDO with 98.7% current efficiency and 2.7-µA quiescent current in 65nm CMOS.

Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Xin Zhang, Po-Hung Chen, Kazunori Watanabe, Makoto Takamiya, Takayasu Sakurai

Proceedings of the IEEE Custom Integrated Circuits Conference, 2010

0.18-V input charge pump with forward body biasing in startup circuit using 65nm CMOS.

Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuaki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai

Proceedings of the IEEE Custom Integrated Circuits Conference, 2010