Chopper-stabilized high-pass sigma delta modulator utilizing a resonator structure. - Koichi Ishida; Minoru Fujishima (IEEE Trans. Circuits Syst. II Express Briefs, 2003)

Subthreshold-leakage suppressed switched capacitor circuit based on super cut-off CMOS (SCCMOS). - Koichi Ishida; Kouichi Kanda; Atit Tamtrakarn; Hiroshi Kawaguchi 001; Takayasu Sakurai (ISCAS (4), 2005)

A 0.5-V sigma-delta modulator using analog T-switch scheme for the subthreshold leakage suppression. - Koichi Ishida; Atit Tamtrakarn; Takayasu Sakurai (ASP-DAC, 2006)

Compact outside-rail circuit structure by single-cascode two-transistor topology. - Atit Tamtrakarn; Hiroki Ishikuro; Koichi Ishida; Takayasu Sakurai (CICC, 2006)

Managing subthreshold leakage in charge-based analog circuits with low-VTH transistors by analog T- switch (AT-switch) and super cut-off CMOS (SCCMOS). - Koichi Ishida; Kouichi Kanda; Atit Tamtrakarn; Hiroshi Kawaguchi 001; Takayasu Sakurai (IEEE J. Solid State Circuits, 2006)

An Outside-Rail Opamp Design Relaxing Low-Voltage Constraint on Future Scaled Transistors. - Koichi Ishida; Atit Tamtrakarn; Hiroki Ishikuro; Makoto Takamiya; Takayasu Sakurai (IEICE Trans. Electron., 2007)

Expected vectorless Teacher-Student Swap (TSS) test method with dual power supply voltages for 0.3V homogeneous multi-core LSI's. - Taro Niiyama; Koichi Ishida; Makoto Takamiya; Takayasu Sakurai (CICC, 2008)

Increasing minimum operating voltage (VDDmin) with number of CMOS logic gates and experimental verification with up to 1Mega-stage ring oscillators. - Taro Niiyama; Piao Zhe; Koichi Ishida; Masami Murakata; Makoto Takamiya; Takayasu Sakurai (ISLPED, 2008)

Dependence of Minimum Operating Voltage (VDDmin) on Block Size of 90-nm CMOS Ring Oscillators and its Implications in Low Power DFM. - Taro Niiyama; Piao Zhe; Koichi Ishida; Masami Murakata; Makoto Takamiya; Takayasu Sakurai (ISQED, 2008)

Effect of resistance of TSV's on performance of boost converter for low power 3D SSD with NAND flash memories. - Tadashi Yasufuku; Koichi Ishida; Shinji Miyamoto; Hiroto Nakai; Makoto Takamiya; Takayasu Sakurai; Ken Takeuchi (3DIC, 2009)

A 100Mbps, 0.19mW asynchronous threshold detector with DC power-free pulse discrimination for impulse UWB receiver. - Lechang Liu; Yoshio Miyamoto; Zhiwei Zhou; Kosuke Sakaida; Jisun Ryu; Koichi Ishida; Makoto Takamiya; Takayasu Sakurai (ASP-DAC, 2009)

Switched Resonant Clocking (SRC) scheme enabling dynamic frequency scaling and low-speed test. - Katsuyuki Ikeuchi; Kosuke Sakaida; Koichi Ishida; Takayasu Sakurai; Makoto Takamiya (CICC, 2009)

Inductor design of 20-V boost converter for low power 3D solid state drive with NAND flash memories. - Tadashi Yasufuku; Koichi Ishida; Shinji Miyamoto; Hiroto Nakai; Makoto Takamiya; Takayasu Sakurai; Ken Takeuchi (ISLPED, 2009)

A stretchable EMI measurement sheet with 8×8 coil array, 2V organic CMOS decoder, and -70dBm EMI detection circuits in 0.18¼m CMOS. - Koichi Ishida; Naoki Masunaga; Zhiwei Zhou; Tadashi Yasufuku; Tsuyoshi Sekitani; Ute Zschieschang; Hagen Klauk; Makoto Takamiya; Takao Someya; Takayasu Sakurai (ISSCC, 2009)

A 1.8V 30nJ adaptive program-voltage (20V) generator for 3D-integrated NAND flash SSD. - Koichi Ishida; Tadashi Yasufuku; Shinji Miyamoto; Hiroto Nakai; Makoto Takamiya; Takayasu Sakurai; Ken Takeuchi (ISSCC, 2009)

A 100 Mbps, 4.1 pJ/bit Threshold Detection-Based Impulse Radio UWB Transceiver in 90 nm CMOS. - Lechang Liu; Yoshio Miyamoto; Zhiwei Zhou; Kosuke Sakaida; Jisun Ryu; Koichi Ishida; Makoto Takamiya; Takayasu Sakurai (IEICE Trans. Electron., 2009)

3D stacked buck converter with 15μm thick spiral inductor on silicon interposer for fine-grain power-supply voltage control in SiP's. - Koichi Ishida; Koichi Takemura; Kazuhiro Baba; Makoto Takamiya; Takayasu Sakurai (3DIC, 2010)

0.18-V input charge pump with forward body biasing in startup circuit using 65nm CMOS. - Po-Hung Chen; Koichi Ishida; Xin Zhang 025; Yasuaki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (CICC, 2010)

EMI Camera LSI (EMcam) with 12 × 4 on-chip loop antenna matrix in 65-nm CMOS to measure EMI noise distribution with 60-µm spatial precision. - Naoki Masunaga; Koichi Ishida; Makoto Takamiya; Takayasu Sakurai (CICC, 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 025; Po-Hung Chen; Kazunori Watanabe; Makoto Takamiya; Takayasu Sakurai (CICC, 2010)

Design of large area electronics with organic transistors. - Makoto Takamiya; Koichi Ishida; Tsuyoshi Sekitani; Takao Someya; Takayasu Sakurai (ICCAD, 2010)

User Customizable Logic Paper (UCLP) with organic sea-of-transmission-gates (SOTG) architecture and ink-jet printed interconnects. - Koichi Ishida; Naoki Masunaga; Ryo Takahashi; Tsuyoshi Sekitani; Shigeki Shino; Ute Zschieschang; Hagen Klauk; Makoto Takamiya; Takao Someya; Takayasu Sakurai (ISSCC, 2010)

Inductor and TSV Design of 20-V Boost Converter for Low Power 3D Solid State Drive with NAND Flash Memories. - Tadashi Yasufuku; Koichi Ishida; Shinji Miyamoto; Hiroto Nakai; Makoto Takamiya; Takayasu Sakurai; Ken Takeuchi (IEICE Trans. Electron., 2010)

Difficulty of Power Supply Voltage Scaling in Large Scale Subthreshold Logic Circuits. - Tadashi Yasufuku; Taro Niiyama; Piao Zhe; Koichi Ishida; Masami Murakata; Makoto Takamiya; Takayasu Sakurai (IEICE Trans. Electron., 2010)

Stretchable EMI Measurement Sheet With 8 ˟ 8 Coil Array, 2 V Organic CMOS Decoder, and 0.18 μ m Silicon CMOS LSIs for Electric and Magnetic Field Detection. - Koichi Ishida; Naoki Masunaga; Zhiwei Zhou; Tadashi Yasufuku; Tsuyoshi Sekitani; Ute Zschieschang; Hagen Klauk; Makoto Takamiya; Takao Someya; Takayasu Sakurai (IEEE J. Solid State Circuits, 2010)

An on-chip characterizing system for within-die delay variation measurement of individual standard cells in 65-nm CMOS. - Xin Zhang 025; Koichi Ishida; Makoto Takamiya; Takayasu Sakurai (ASP-DAC, 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 025; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (A-SSCC, 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 025; Kentaro Honda; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (ISSCC, 2011)

100V AC power meter system-on-a-film (SoF) integrating 20V organic CMOS digital and analog circuits with floating gate for process-variation compensation and 100V organic PMOS rectifier. - Koichi Ishida; Tsung-Ching Huang; Kentaro Honda; Tsuyoshi Sekitani; Hiroyoshi Nakajima; Hiroki Maeda; Makoto Takamiya; Takao Someya; Takayasu Sakurai (ISSCC, 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 025; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (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 025; Po-Hung Chen; Kazunori Watanabe; Makoto Takamiya; Takayasu Sakurai (IEICE Trans. Electron., 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 025; Yu Pu; Koichi Ishida; Yoshikatsu Ryu; Yasuyuki Okuma; Po-Hung Chen; Takayasu Sakurai; Makoto Takamiya (IEICE Trans. Electron., 2011)

User Customizable Logic Paper (UCLP) With Sea-Of Transmission-Gates (SOTG) of 2-V Organic CMOS and Ink-Jet Printed Interconnects. - Koichi Ishida; Naoki Masunaga; Ryo Takahashi; Tsuyoshi Sekitani; Shigeki Shino; Ute Zschieschang; Hagen Klauk; Makoto Takamiya; Takao Someya; Takayasu Sakurai (IEEE J. Solid State Circuits, 2011)

1.8 V Low-Transient-Energy Adaptive Program-Voltage Generator Based on Boost Converter for 3D-Integrated NAND Flash SSD. - Koichi Ishida; Tadashi Yasufuku; Shinji Miyamoto; Hiroto Nakai; Makoto Takamiya; Takayasu Sakurai; Ken Takeuchi (IEEE J. Solid State Circuits, 2011)

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 025; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (ASP-DAC, 2012)

Insole pedometer with piezoelectric energy harvester and 2V organic digital and analog circuits. - Koichi Ishida; Tsung-Ching Huang; Kentaro Honda; Yasuhiro Shinozuka; Hiroshi Fuketa; Tomoyuki Yokota; Ute Zschieschang; Hagen Klauk; Gregory Tortissier; Tsuyoshi Sekitani; Makoto Takamiya; Hiroshi Toshiyoshi; et al. (ISSCC, 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 025; Po-Hung Chen; Yoshikatsu Ryu; Koichi Ishida; Yasuyuki Okuma; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (VLSIC, 2012)

EMI Camera LSI (EMcam) with On-Chip Loop Antenna Matrix to Measure EMI Noise Spectrum and Distribution. - Naoki Masunaga; Koichi Ishida; Takayasu Sakurai; Makoto Takamiya (IEICE Trans. Electron., 2012)

Startup Techniques for 95 mV Step-Up Converter by Capacitor Pass-On Scheme and VTH-Tuned Oscillator With Fixed Charge Programming. - Po-Hung Chen; Koichi Ishida; Katsuyuki Ikeuchi; Xin Zhang 025; Kentaro Honda; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (IEEE J. Solid State Circuits, 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 025; Koichi Ishida; Yasuyuki Okuma; Yoshikatsu Ryu; Makoto Takamiya; Takayasu Sakurai (IEEE J. Solid State Circuits, 2012)

A 100-V AC Energy Meter Integrating 20-V Organic CMOS Digital and Analog Circuits With a Floating Gate for Process Variation Compensation and a 100-V Organic pMOS Rectifier. - Koichi Ishida; Tsung-Ching Huang; Kentaro Honda; Tsuyoshi Sekitani; Hiroyoshi Nakajima; Hiroki Maeda; Makoto Takamiya; Takao Someya; Takayasu Sakurai (IEEE J. Solid State Circuits, 2012)

A 1-V-Input Switched-Capacitor Voltage Converter With Voltage-Reference-Free Pulse-Density Modulation. - Xin Zhang 025; 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)

On-Chip Measurement System for Within-Die Delay Variation of Individual Standard Cells in 65-nm CMOS. - Xin Zhang 025; Koichi Ishida; Hiroshi Fuketa; Makoto Takamiya; Takayasu Sakurai (IEEE Trans. Very Large Scale Integr. Syst., 2012)

A low voltage buck DC-DC converter using on-chip gate boost technique in 40nm CMOS. - Xin Zhang 025; Po-Hung Chen; Yoshikatsu Ryu; Koichi Ishida; Yasuyuki Okuma; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (ASP-DAC, 2013)

Reducing IR drop in 3D integration to less than 1/4 using Buck Converter on Top die (BCT) scheme. - Yasuhiro Shinozuka; Hiroshi Fuketa; Koichi Ishida; Futoshi Furuta; Kenichi Osada; Kenichi Takeda; Makoto Takamiya; Takayasu Sakurai (ISQED, 2013)

1µm-thickness 64-channel surface electromyogram measurement sheet with 2V organic transistors for prosthetic hand control. - Hiroshi Fuketa; Kazuaki Yoshioka; Yasuhiro Shinozuka; Koichi Ishida; Tomoyuki Yokota; Naoji Matsuhisa; Yusuke Inoue 002; Masaki Sekino; Tsuyoshi Sekitani; Makoto Takamiya; Takao Someya; Takayasu Sakurai (ISSCC, 2013)

Large-area and flexible sensors with organic transistors. - Hiroshi Fuketa; Koichi Ishida; Tsuyoshi Sekitani; Makoto Takamiya; Takao Someya; Takayasu Sakurai (IWASI, 2013)

Insole Pedometer With Piezoelectric Energy Harvester and 2 V Organic Circuits. - Koichi Ishida; Tsung-Ching Huang; Kentaro Honda; Yasuhiro Shinozuka; Hiroshi Fuketa; Tomoyuki Yokota; Ute Zschieschang; Hagen Klauk; Gregory Tortissier; Tsuyoshi Sekitani; Hiroshi Toshiyoshi; Makoto Takamiya; et al. (IEEE J. Solid State Circuits, 2013)

22.5 dB open-loop gain, 31 kHz GBW pseudo-CMOS based operational amplifier with a-IGZO TFTs on a flexible film. - Koichi Ishida; Reza Shabanpour; Bahman Kheradmand Boroujeni; Tilo Meister; Corrado Carta; Frank Ellinger; Luisa Petti; Niko Münzenrieder; Giovanni A. Salvatore; Gerhard Tröster (A-SSCC, 2014)

High gain amplifiers in flexible self-aligned a-IGZO thin-film-transistor technology. - Reza Shabanpour; Tilo Meister; Koichi Ishida; Luisa Petti; Niko Münzenrieder; Giovanni A. Salvatore; Bahman Kheradmand Boroujeni; Corrado Carta; Gerhard Tröster; Frank Ellinger (ICECS, 2014)

Cherry-Hooper amplifiers with 33 dB gain at 400 kHz BW and 10 dB gain at 3.5 MHz BW in flexible self-aligned a-IGZO TFT technology. - Reza Shabanpour; Tilo Meister; Koichi Ishida; Bahman Kheradmand Boroujeni; Corrado Carta; Udo Jörges; Frank Ellinger; Luisa Petti; Niko Münzenrieder; Giovanni A. Salvatore; Gerhard Tröster (ISPACS, 2014)

Flexible, large-area, and distributed organic electronics closely contacted with skin for healthcare applications. - Makoto Takamiya; Hiroshi Fuketa; Koichi Ishida; Tomoyuki Yokota; Tsuyoshi Sekitani; Takao Someya; Takayasu Sakurai (MWSCAS, 2014)

A 0.6 V Input CCM/DCM Operating Digital Buck Converter in 40 nm CMOS. - Xin Zhang 025; Po-Hung Chen; Yasuyuki Okuma; Koichi Ishida; Yoshikatsu Ryu; Kazunori Watanabe; Takayasu Sakurai; Makoto Takamiya (IEEE J. Solid State Circuits, 2014)

1 µm-Thickness Ultra-Flexible and High Electrode-Density Surface Electromyogram Measurement Sheet With 2 V Organic Transistors for Prosthetic Hand Control. - Hiroshi Fuketa; Kazuaki Yoshioka; Yasuhiro Shinozuka; Koichi Ishida; Tomoyuki Yokota; Naoji Matsuhisa; Yusuke Inoue 002; Masaki Sekino; Tsuyoshi Sekitani; Makoto Takamiya; Takao Someya; Takayasu Sakurai (IEEE Trans. Biomed. Circuits Syst., 2014)

Bendable energy-harvesting module with organic photovoltaic, rechargeable battery, and a-IGZO TFT charging electronics. - Tilo Meister; Koichi Ishida; Reza Shabanpour; Bahman Kheradmand Boroujeni; Corrado Carta; Frank Ellinger; Niko Münzenrieder; Luisa Petti; Giovanni A. Salvatore; Gerhard Tröster; Michael Wagner 021; Pol Ghesquière; et al. (ECCTD, 2015)

A fully integrated audio amplifier in flexible a-IGZO TFT technology for printed piezoelectric loudspeakers. - Reza Shabanpour; Corrado Carta; Tilo Meister; Koichi Ishida; Bahman Kheradmand Boroujeni; Frank Ellinger; Niko Münzenrieder; Giovanni A. Salvatore; Luisa Petti; Gerhard Tröster (ECCTD, 2015)

Baseband amplifiers in a-IGZO TFT technology for flexible audio systems. - Reza Shabanpour; Corrado Carta; Koichi Ishida; Tilo Meister; Bahman Kheradmand Boroujeni; Niko Münzenrieder; Luisa Petti; Giovanni A. Salvatore; Gerhard Tröster; Frank Ellinger (ISPACS, 2015)

A 70°phase margin OPAMP with positive feedback in flexible a-IGZO TFT technology. - Reza Shabanpour; Koichi Ishida; Tilo Meister; Niko Münzenrieder; Luisa Petti; Giovanni A. Salvatore; Bahman Kheradmand Boroujeni; Corrado Carta; Gerhard Tröster; Frank Ellinger (MWSCAS, 2015)

15 dB Conversion gain, 20 MHz carrier frequency AM receiver in flexible a-IGZO TFT technology with textile antennas. - Koichi Ishida; Reza Shabanpour; Tilo Meister; Bahman Kheradmand Boroujeni; Corrado Carta; Luisa Petti; Niko Münzenrieder; Giovanni A. Salvatore; Gerhard Tröster; Frank Ellinger (VLSIC, 2015)

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)

A Data Gathering Method Considering Volume of Transmission Range for Fish Farm Monitoring. - Koichi Ishida; Yoshiaki Taniguchi; Nobukazu Iguchi (EMS, 2016)

20.3dB 0.39mW AM detector with single-transistor active inductor in bendable a-IGZO TFT. - Tilo Meister; Koichi Ishida; Reza Shabanpour; Bahman Kheradmand Boroujeni; Corrado Carta; Niko Münzenrieder; Luisa Petti; Giuseppe Cantarella; Giovanni A. Salvatore; Gerhard Tröster; Frank Ellinger (ESSCIRC, 2016)

3.5mW 1MHz AM detector and digitally-controlled tuner in a-IGZO TFT for wireless communications in a fully integrated flexible system for audio bag. - Tilo Meister; Koichi Ishida; Corrado Carta; Reza Shabanpour; Bahman Kheradmand Boroujeni; Niko Münzenrieder; Luisa Petti; Giovanni A. Salvatore; G. Schmidt; Pol Ghesquière; Stefan Kiefl; G. De Toma; et al. (VLSI Circuits, 2016)

A Fully-Printed Self-Biased Polymeric Audio Amplifier for Driving Fully-Printed Piezoelectric Loudspeakers. - Bahman Kheradmand Boroujeni; Georg Cornelius Schmidt; Daniel Höft; Maxi Bellmann; Katherina Haase; Koichi Ishida; Reza Shabanpour; Tilo Meister; Corrado Carta; Pol Ghesquière; Arved C. Hübler; Frank Ellinger (IEEE Trans. Circuits Syst. I Regul. Pap., 2016)

A transistor model for a-IGZO TFT circuit design built upon the RPI-aTFT model. - Reza Shabanpour; Tilo Meister; Koichi Ishida; Bahman Kheradmand Boroujeni; Corrado Carta; Frank Ellinger; Luisa Petti; Niko Münzenrieder; Giovanni A. Salvatore; Gerhard Tröster (NEWCAS, 2017)

A Method for Gathering Sensor Data for Fish-Farm Monitoring Considering the Transmission-Range Volume. - Koichi Ishida; Yoshiaki Taniguchi; Nobukazu Iguchi (IEICE Trans. Inf. Syst., 2018)

A Routing Method for Fish Farm Monitoring Under Short Transmission Range Condition. - Koichi Ishida; Yoshiaki Taniguchi; Nobukazu Iguchi (IEICE Trans. Inf. Syst., 2018)

5-31-Hz 188- $ mu$ W Light-Sensing Oscillator With Two Active Inductors Fully Integrated on Plastic. - Tilo Meister; Koichi Ishida; Stefan Knobelspies; Giuseppe Cantarella; Niko Münzenrieder; Gerhard Tröster; Corrado Carta; Frank Ellinger (IEEE J. Solid State Circuits, 2019)

Mechanical and Electrical Design Strategies for Flexible InGaZnO Circuits. - Giuseppe Cantarella; Niko Münzenrieder; Luisa Petti; Koichi Ishida; Tilo Meister; Corrado Carta; Frank Ellinger; Raoul Hopf (MIXDES, 2021)

Exact Analysis of a Linear Velocity Sensor. - Toshiya Itaya; Koichi Ishida; Akio Tanaka; Nobuo Takehira (IEEE Trans. Instrum. Meas., 2021)