A Dual-Mode 2:1 Switched Capacitor Converter with >65% Efficiency over 1000x Load Current Range and One Clock Cycle Transient Response April 2, 2023 - Yi Tan, Hiroki Ishikuro, "A Dual-Mode 2:1 Switched Capacitor Converter with >65% Efficiency over 1000x Load Current Range and One Clock…
In Situ Monitoring Technique of Self-Heating in Bulk MOSFETs at Cryogenic Temperatures using Subthreshold Current April 2, 2023 - Masayuki Ichikawa, Takahisa Tanaka, Ken Uchida, Tomohisa Miyao, Munehiro Tada, and Hiroki Ishikuro, "In Situ Monitoring Technique of Self-Heating in Bulk…
Enhanced Drain Current in Transient Mode due to Long Ionization Time of Shallow Impurities at 4 K in 65-nm bulk Cryo CMOS Transistors April 2, 2023 - Tomohisa Miyao, Takahisa Tanaka, Itsuki Imanishi, Masayuki Ichikawa, Shuya Nakagawa, Hiroki Ishikuro, Toshitsugu Sakamoto, Munehiro Tada, and Ken Uchida, "Enhanced Drain…
Robust Readout Circuit with Leakage Current Cancellation Technique for Stretchable Touch Sensors April 2, 2023 - Kaoru Yamashita, Tokihiko Shimura, Shun Sato, Naoji Matsuhisa, and Hiroki Ishikuro, "Robust Readout Circuit with Leakage Current Cancellation Technique for Stretchable…
An Amp-Less Time-Domain AC Bridge for Impedance Spectroscopy with 1-bit ΔΣ DAC April 2, 2023 - Yuya Maekawa, Hiroki Ishikuro, "An Amp-Less Time-Domain AC Bridge for Impedance Spectroscopy with 1-bit ΔΣ DAC" presented at 2021 28th IEEE…
A Switched-Capacitor DC-DC Converter with > 77.3% Efficiency and 80 ns Active Transient Response in 40 μA – 4 mA Load Current Range November 6, 2021 - Yi Tan and Hiroki Ishikuro, “A Switched-Capacitor DC-DC Converter with > 77.3% Efficiency and 80 ns Active Transient Response in…
A Fast Wake-Up and High Accuracy Sensor Interface by Synchronous Sampling with Power-Efficient Switching Regulator November 6, 2021 - Yuya Fuketa, Kohei Tatehora, Yohsuke Shiiki, Shuya Nakagawa, and Hiroki Ishikuro, “A Fast Wake-Up and High Accuracy Sensor Interface by…
An up to 35dBc/Hz Phase Noise Improving Design Methodology for Differential-Ring-Oscillators Applied in Ultra-Low Power Systems November 6, 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…
Gate Voltage Optimization in Capacitive DC-DC Converters for Thermoelectric Energy Harvesting November 6, 2021 - Yi Tan, Yohsuke Shiiki, and Hiroki Ishikuro, “Gate Voltage Optimization in Capacitive DC-DC Converters for Thermoelectric Energy Harvesting,” 26th Asia…
An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept November 6, 2021 - Peter Toth and Hiroki Ishikuro, “An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept,” 26th…
A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC November 6, 2021 - Yuya Maekawa, Syuya Nakagawa, and Hiroki Ishikuro, "A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC," 2020…
A High-Resolution Oscillator Based Resistance-to-Digital Converter with Non-Linearity Canceling Feedback by ΔΣ Modulated Variable Resistor November 6, 2021 - Shuya Nakagawa, Takumi Miyazaki, and Hiroki Ishikuro, "A High-Resolution Oscillator Based Resistance-to-Digital Converter with Non-Linearity Canceling Feedback by ΔΣ Modulated…
A Wide Range and High Accuracy Sensor Interface with Switching Regulator for Coin-Cell Powered Tiny Wireless Sensor Node, November 6, 2021 - K. Tatehora, Y. Shiiki, S. Nakagawa, T. Tanaka, K. Uchida, and H. Ishikuro, "A Wide Range and High Accuracy Sensor…
A 0.12V Fully Integrated Charge Pump with Gate Voltage Optimization for Energy Harvesting Applications November 6, 2021 - Yi Tan, Yohsuke Shiiki, and Hiroki Ishikuro, "A 0.12V Fully Integrated Charge Pump with Gate Voltage Optimization for Energy Harvesting…
A Discrete-Time Model for Frequency Modulated Charge Pumps with Synchronized Controller November 6, 2021 - Yi Tan and Hiroki Ishikuro, "A Discrete-Time Model for Frequency Modulated Charge Pumps with Synchronized Controller," 2020 IEEE 63rd International…
A Wide Input-Range, Low-Power and Highly Flexible 18 Bit Time-to-Digital Converter with Compact Differential Circuit Topology November 6, 2021 - Peter Toth and Hiroki Ishikuro, "A Wide Input-Range, Low-Power and Highly Flexible 18 Bit Time-to-Digital Converter with Compact Differential Circuit…
A Linearity Testing of Cascaded Analog Mixed-Signal Blocks Using SEIR MethodA Linearity Testing of Cascaded Analog Mixed-Signal Blocks Using SEIR Method November 6, 2021 - Tatsuya Ishikawa, Chia-Wei Pai, and Hiroki Ishikuro, "A Linearity Testing of Cascaded Analog Mixed-Signal Blocks Using SEIR Method," 2020 IEEE…
A Digital-to-Resistance Converter with an Automatic Offset Calibration Method for Evaluating Dynamic Performance of Resistive Sensor Readout Circuits November 6, 2021 - Shuya Nakagawa, Takumi Miyazaki, and Hiroki Ishikuro, "A Digital-to-Resistance Converter with an Automatic Offset Calibration Method for Evaluating Dynamic Performance…
High-Resolution Auto-Balancing Wheatstone-Bridge with Successive Approximation of ΔΣ-Modulated Digitally Controlled Variable Resistor November 6, 2021 - Takumi Miyazaki, Shuya Nakagawa, and Hiroki Ishikuro, "High-Resolution Auto-Balancing Wheatstone-Bridge with Successive Approximation of ΔΣ-Modulated Digitally Controlled Variable Resistor," 2019…
A Differential-Ring-Oscillator with up to 35 dBc/Hz Phase Noise Improving Amplitude Feedback Loop for Ultra Low Power Systems November 6, 2021 - Peter Toth and Hiroki Ishikuro, "A Differential-Ring-Oscillator with up to 35 dBc/Hz Phase Noise Improving Amplitude Feedback Loop for Ultra…
A High Accuracy Opamp-less Interface Circuit for 2-D Cross-Point Resistive Sensor Array with Switch Resistance Calibration November 6, 2021 - Yohsuke Shiiki and Hiroki Ishikuro, "A High Accuracy Opamp-less Interface Circuit for 2-D Cross-Point Resistive Sensor Array with Switch Resistance…
Low-Power and ppm-Level Detection of Gas Molecules by Integrated Metal Nanosheets November 6, 2021 - T. Tanaka, K. Tabuchi, K. Tatehora, Y. Shiiki, S. Nakagawa, T. Takahashi, R. Shimizu, H. Ishikuro, T. Kuroda, T. Yanagida,…
Interface with Opamp Output-Impedance Calibration Technique for a Large Integrated 2-D Resistive Sensor Array November 6, 2021 - Yohsuke Shiiki, Hiroki Ishikuro, “Interface with Opamp Output-Impedance Calibration Technique for a Large Integrated 2-D Resistive Sensor Array,” 2019 IEEE…
Arbitrary Magnetic Field Control Technique by Multi-Coil Transmitter Voltage Phase Shifting for Omni-Directional Free-Positioning Magnetic Resonance Wireless Power Delivery November 6, 2021 - Yusuke Inada, Toru Kawajiri, Ukyo Takeda, and Hiroki Ishikuro, "Arbitrary Magnetic Field Control Technique by Multi-Coil Transmitter Voltage Phase Shifting…
A Switched-Capacitor DC-DC Converter with > 77.3% Efficiency and 80 ns Active Transient Response in 40 μA – 4 mA Load Current Range November 6, 2021 - Yi Tan and Hiroki Ishikuro, “A Switched-Capacitor DC-DC Converter with > 77.3% Efficiency and 80 ns Active Transient Response in…
A Fast Wake-Up and High Accuracy Sensor Interface by Synchronous Sampling with Power-Efficient Switching Regulator November 6, 2021 - Yuya Fuketa, Kohei Tatehora, Yohsuke Shiiki, Shuya Nakagawa, and Hiroki Ishikuro, “A Fast Wake-Up and High Accuracy Sensor Interface by…
An up to 35dBc/Hz Phase Noise Improving Design Methodology for Differential-Ring-Oscillators Applied in Ultra-Low Power Systems November 6, 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…
Gate Voltage Optimization in Capacitive DC-DC Converters for Thermoelectric Energy Harvesting November 6, 2021 - Yi Tan, Yohsuke Shiiki, and Hiroki Ishikuro, “Gate Voltage Optimization in Capacitive DC-DC Converters for Thermoelectric Energy Harvesting,” 26th Asia…
An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept November 6, 2021 - Peter Toth and Hiroki Ishikuro, “An 18 Bit Time-to-Digital Converter Design with Large Dynamic Range and Automated Multi-Cycle Concept,” 26th…
A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC November 6, 2021 - Yuya Maekawa, Syuya Nakagawa, and Hiroki Ishikuro , "A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC,"…
Wide Input-Range, Low-Power and Highly Flexible 18 Bit Time-to-Digital Converter with Compact Differential Circuit Topology July 9, 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,…
A 0.12V Fully Integrated Charge Pump with Gate Voltage Optimization for Energy Harvesting Applications June 5, 2020 - Yi Tan, Yohsuke Shiiki, Hiroki Ishikuro, "A 0.12V Fully Integrated Charge Pump with Gate Voltage Optimization for Energy Harvesting Applications,"…
A Wide Range and High Accuracy Sensor Interface with Switching Regulator for Coin-Cell Powered Tiny Wireless Sensor Node June 5, 2020 - Kohei Tatehora, Yohsuke Shiiki, Shuya Nakagawa, Takahisa Tanaka, Ken Uchida, Hiroki Ishikuro, "A Wide Range and High Accuracy Sensor Interface…
A High-Resolution Oscillator Based Resistance-to-Digital Converter with Non-Linearity Cancelling Feedback by ΔΣ Modulated Variable Resistor June 5, 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…
A High-Resolution Time-Based Resistance-to-Digital Converter with TDC and Counter April 3, 2018 - Shuya Nakagawa, Kaito Horikos...
Dual Transmitter Free-Positioning wireless Power Transfer System with Optimum Switching Phase Detection Technique April 3, 2018 - Ukyo Takeda, Yousuke Inada, Y...
Measurement time reduction technique for input referred noise of dynamic comparator April 3, 2018 - Yuki Ishijima, Shuya Nakagawa...
Design of resource sharing reconfigurable ΔΣ SAR-ADC April 3, 2018 - Motomi Ishizuka, Kohei Yamada...
Open loop dynamic transmitter voltage scaling for fast response and wide load range power efficient WPT system April 3, 2017 - Toru Kawajiri and Hiroki Ishi...
Distortion and its suppression in low-power delta-sigma modulator April 3, 2017 - Hiroki Ishikuro, " Distortion...
A simplified path interference model in 2D multi-hop wireless power transfer system, April 3, 2016 - Ryouta Shibuya, Toru Kawajiri...
A programmable ΔΣ SAR-ADC with charge shuttling technique April 3, 2016 - Kohei Yamada, Yosuke Toyama, ...
A low-power third-order ΔΣ modulator using ring amplifiers with power-saving technique April 3, 2016 - Alexis Gryta, Takuma Suguro a...
A Near-Optimum 13.56 MHz CMOS Active Rectifier With Circuit-Delay Real-Time Calibrations for High-Current Biomedical Implants April 3, 2016 - Cheng Huang, Toru Kawajiri, a...
A wireless power transfer system with enhanced response and efficiency by fully-integrated fast-tracking wireless constant-idle-time control for implants April 3, 2016 - Cheng Huang, Toru Kawajiri, a...
Low power DT delta-sigma modulator with ring amplifier SC-integrator April 3, 2016 - Takuma Suguro, and Hiroki Ish...
Dynamic period switching of PRS-PWM with run-length limiting technique for spurious and ripple reduction in fast response wireless power transmission April 3, 2016 - Takahiro Moroto, Toru Kawajir...
A 24mW 5.5Gbps dual frequency conversion demodulator for impulse-radio with first sidelobe April 3, 2016 - Kaoru Kohira, Naoki Kitazawa,...
A Low EMI SIDO
Wireless Power Transfer System
with 10usec Response Time, April 3, 2015 - Toru Kawajiri, Takahiro Morot...
I/Q Mismatch Compensation ΔΣ
Modulator Using Ternary Capacitor Rotation Technique, April 3, 2015 - Masaki Yonekura and Hiroki Is...
A 1.6 Gs/S 3.17 mW 6-B Passive
Pipelined Binary-Search ADC
with Memory Effect Canceller and Reference Voltage Calibration, April 3, 2015 - Koki Tanaka, Ryo Saito, and H...
A 0.5-V 5.2-fJ/Conversion-Step Full Asynchronous SAR ADC With Leakage Power Reduction Down to 650 pW by Boosted Self-Power Gating in 40-nm CMOS, August 31, 2011 - R. Sekimoto, A. Shikata, K. Yo...
A 0.0058mm2 7.0 ENOB 24MS/s 17fJ/conv. Threshold Configuring SAR ADC with Source Voltage Shifting and Interpolation Technique, August 31, 2011 - K. Yoshioka, A. Shikata, R. Se...