Sohmyung Ha

123 papers C 18Journal 49Unranked 56
YearRankTypeTitle / Venue / Authors
2026 — conf
A 0.62μW/sensor 82fps Time-to-Digital Impedance Measurement IC with Unified Excitation/Readout Front-End for Large-Scale Piezo-Resistive Sensor Array.
ISSCC
Jiayang Li, Qingyu Zhang, Sohmyung Ha, Andreas Demosthenous, Dai Jiang, Yu Wu
2026 — conf
A 43.8-to-662.0μW 27.5-to-878.9fps Frame-Rate-Scalable Duty-Cycled Electrical Impedance Tomography System with MIMO Current-Balancing IA.
ISSCC
Haidam Choi, Gichan Yun, Ji-Hoon Suh, Seonwoo Park, Donghyeon Yi, Sohmyung Ha, Minkyu Je
2026 J jnl
A Neural Recording IC for 64-Channel Time-Multiplexed MEA with 3.3-G$\Omega$ Total Input Impedance Using Dual Positive Feedback Loop $Z_{\textit{IN}}$-Boosting.
IEEE Trans. Biomed. Circuits Syst.
Christopher Santos, Dong-Hwi Choi, Sohmyung Ha, Minkyu Je
2026 J jnl
A Spike Sorting SoC With Δ-Based Spike Detection and End-to-End Implementation of Autoencoder Feature Extraction Using Analog CIM.
IEEE J. Solid State Circuits
Vincent Lukito, Edward Jongyoon Choi, Ik-Joon Chang, Sohmyung Ha, Minkyu Je
2026 J jnl
Human Limb ExG Monitoring System Using Four-Node Body Channel Communication With Adaptive Gain Control.
IEEE J. Solid State Circuits
Song-I Cheon, Dongyoon Lee, Hyungjoo Cho, Seonghyun Park, Sohmyung Ha, Minkyu Je
2025 — conf
28.2 A 189.3dB-FoMs 14.5fJ/Conversion-Step Continuous-Time Noise-Shaping SAR Capacitance-to-Digital Converter.
ISSCC
Gichan Yun, Haidam Choi, Yoontae Jung, Jiho Myung, Sein Oh, Sohmyung Ha, Minkyu Je
2025 J jnl
A 0.62 μW/sensor 82 fps Time-to-Digital Impedance Measurement IC with Unified Excitation/Readout Front-end for Large-Scale Piezo-Resistive Sensor Array.
CoRR
Jiayang Li, Qingyu Zhang, Sohmyung Ha, Dai Jiang, Andreas Demosthenous, Yu Wu
2025 J jnl
A 2.0-mW 70.1-dB SNDR 7.8-MHz BW Continuous-Time Noise-Shaping SAR ADC Using Fully Parallelized Quantization.
IEEE Trans. Circuits Syst. II Express Briefs
Gichan Yun, Sein Oh, Heewon Choee, Haidam Choi, Sohmyung Ha, Minkyu Je
2025 C conf
A 64-channel Time-multiplexed Neural Recording IC with Dual Positive Feedback Loop ZIN-Boosting.
ISCAS
Christopher Santos, Dong-Hwi Choi, Sohmyung Ha, Minkyu Je
2025 — conf
A 6µW ECG-Recording ΔΣ Modulator with Internal-Capacitor-Flipping Technique for 34Vpp Common-Mode-Interference (CMI) Tolerance and 1Vpp Input Range.
CICC
Jimin Koo, Sein Oh, Yoontae Jung, Vincent Lukito, Sohmyung Ha, Minkyu Je
2025 — conf
A 94.76%-accuracy, <16μs/classification-latency STT-MRAM CiM-based Classifier for Closed-loop Peripheral Nerve Modulation Implants.
AICAS
Seoyoung Lee, Donghyeon Yi, Edward Choi, Vincent Lukito, Jongho Kim, Ryan G. L. Koh, Sohmyung Ha, Ik-Joon Chang, Minkyu Je
2025 C conf
A 99.8-nV/√Hz ΔΣ Modulator with an Input-Impedance-Boosted kT/C-Noise-Cancellation Integrator for Biopotential-Signal Acquisition.
ISCAS
Jiho Myung, Gichan Yun, Heewon Choee, Yegeun Kim, Sohmyung Ha, Minkyu Je
2025 C conf
A Low-Noise Dynamic Comparator with Charge-Pump Pre-Amplifier.
ISCAS
Heewon Choee, Yegeun Kim, Sein Oh, Sohmyung Ha, Minkyu Je
2025 J jnl
A Motion-Artifact-Tolerant Biopotential-Recording IC With a Digital-Assisted Loop.
IEEE Trans. Biomed. Circuits Syst.
Yegeun Kim, Changhun Seok, Yoontae Jung, Soon-Jae Kweon, Sohmyung Ha, Minkyu Je
2025 C conf
A Self-Powered Pressure Sensor System Based on Triboelectric Energy Harvesting for Knee Implants.
ISCAS
Trinh Van Thai, Phan Dang Hung, Yunchul Chung, Kim-Hoang Nguyen, Sohmyung Ha, Minkyu Je
2025 J jnl
A Time-Domain Multi-Channel Resistive-Sensor Interface IC With High Energy Efficiency and Wide Input Range.
IEEE Trans. Biomed. Circuits Syst.
Sunglim Han, Hoyong Seong, Sein Oh, Jimin Koo, Hanbit Jin, Hye Jin Kim, Sohmyung Ha, Minkyu Je
2025 — conf
An 18.5nF-Input-Range PM-SAR-Hybrid Capacitance-to-Digital Converter Achieving 6.1μs Conversion Time at 18.1pF Input Capacitance.
ISSCC
Donghyun Youn, Kyeongwon Jeong, Woongro Youn, Hoyong Seong, Yechan Park, Sohmyung Ha, Minkyu Je
2025 J jnl
An Energy-Efficient Stimulation System Based on Adaptive Dynamic Voltage Switching Control for Cochlear Implants.
IEEE Trans. Biomed. Circuits Syst.
Woojin Ahn, Kim-Hoang Nguyen, Hoseung Lee, Kyou Sik Min, Sohmyung Ha, Minkyu Je
2025 J jnl
An Ultra-Low-Power Amplifier-Less Potentiostat Design Based on Digital Regulation Loop.
IEEE Trans. Biomed. Circuits Syst.
Muhammad Abrar Akram, Aida Aberra, Soon-Jae Kweon, Sohmyung Ha
2025 J jnl
Asynchronous Quadrature-Phase Undersampling Technique for Wide-Frequency Impedance Measurement.
IEEE Trans. Instrum. Meas.
Soon-Jae Kweon, Uljad Berdica, Hyunwoo Park, Muhammad Abrar Akram, Minji Lee, Sohmyung Ha
2025 C conf
Implantable Galvanic-Coupled Body Channel Communication Transceiver with Serpentine-Interconnection Electrode Pair for Post-Operative Monitoring of Joint Replacement.
ISCAS
Yunchul Chung, Hyunyeop Lee, Dongyoon Lee, Sohmyung Ha, Minkyu Je
2025 J jnl
Special Section on Selected Papers From IEEE BioCAS 2024.
IEEE Trans. Biomed. Circuits Syst.
Sohmyung Ha, Hossein Kassiri, Milin Zhang, Andrea Cossettini
2024 — conf
3.6 An Amplifier-Less CMOS Potentiostat IC Consuming 3.7nW Power all over 129.5dB Dynamic Range for Electrochemical Biosensing.
ISSCC
Muhammad Abrar Akram, Aida Aberra, Soon-Jae Kweon, Sohmyung Ha
2024 — conf
33.8 A Two-Electrode Bio-Impedance Readout IC with Complex-Domain Noise-Correlated Baseline Cancellation Supporting Sinusoidal Excitation.
ISSCC
Song-I Cheon, Haidam Choi, Gichan Yun, Sein Oh, Ji-Hoon Suh, Sohmyung Ha, Minkyu Je
2024 — conf
A 1.27-mW Battery-Powered Multimodal Biosensor Interface IC for Wireless Motion Intention Recognition in Wearable Robots.
A-SSCC
Jimin Koo, Haidam Choi, Yoontae Jung, Ji-Hoon Suh, Sein Oh, Changhun Seok, Yegeun Kim, Injun Choi, Heewon Choee, Sunglim Han, Jiho Chun, Hoyong Seong, Sohmyung Ha, Minkyu Je
2024 — conf
A 1.3mW 10MHz-BW 71dB-SNDR Two-Step TDCAssisted Continuous-Time Noise-Shaping SAR ADC.
A-SSCC
Sein Oh, Gichan Yun, Heewon Choee, Yoontae Jung, Jimin Koo, Sohmyung Ha, Minkyu Je
2024 J jnl
A 15.4-ENOB, Fourth-Order Truncation-Error-Shaping NS-SAR-Nested ΔΣ Modulator With Boosted Input Impedance and Range for Biosignal Acquisition.
IEEE J. Solid State Circuits
Kyeongwon Jeong, Sohmyung Ha, Minkyu Je
2024 J jnl
A 187-dB FoM
IEEE J. Solid State Circuits
Yoontae Jung, Sein Oh, Sohmyung Ha, Minkyu Je
2024 — conf
A 5.7kfps Fast Neural Electrical Impedance Tomography IC Based on Incremental Zoom Structure with Baseline Cancellation for Peripheral Nerve Monitoring Systems.
VLSI Technology and Circuits
Ji-Hoon Suh, Haidam Choi, Yoontae Jung, Sohmyung Ha, Minkyu Je
2024 — conf
A 639.38GOPS Hybrid-Domain Logic-Compatible Multi-Level Embedded Flash Computing-in-Memory Macro with Spike-Edge Computation.
A-SSCC
Jiho Chun, Edward Choi, Byeongseon Choi, Donghyeon Yi, Sohmyung Ha, Ik-Joon Chang, Minkyu Je
2024 C conf
A 72-channel Resistive-sensor Interface IC with High Energy Efficiency and a Wide Input Range.
ISCAS
Sunglim Han, Hoyong Seong, Sein Oh, Jimin Koo, Hanbit Jin, Hye Jin Kim, Sohmyung Ha, Minkyu Je
2024 J jnl
A Bio-Impedance Readout IC With Complex-Domain Noise-Correlated Baseline Cancellation.
IEEE J. Solid State Circuits
Haidam Choi, Song-I Cheon, Gichan Yun, Sein Oh, Ji-Hoon Suh, Sohmyung Ha, Minkyu Je
2024 C conf
A Biopotential Recording IC with <10-ms-Settling Hybrid DC Servo Loop.
ISCAS
Yegeun Kim, Changhun Seok, Yoontae Jung, Sohmyung Ha, Minkyu Je
2024 — conf
A Fully Dynamic 1
VLSI Technology and Circuits
Haidam Choi, Gichan Yun, Ji-Hoon Suh, Sein Oh, Song-I Cheon, Yoontae Jung, Sohmyung Ha, Minkyu Je
2024 — conf
A High-Efficiency High-Data-Rate Wireless Power and Data Transfer IC Using Orthogonal Codes for Miniatureized Multi-Channel Neural Interface Systems.
ISOCC
Chan Park, Sohmyung Ha, Minkyu Je
2024 C conf
A High-throughput Impedance Measurement IC Using Synchronous Cyclic Integration Technique.
ISCAS
Karam Ellahi, Soon-Jae Kweon, Asra Malik, Muhammad Abrar Akram, Song-I Cheon, Yoontae Jung, Minkyu Je, Hammad M. Cheema, Sohmyung Ha
2024 C conf
A High-throughput Impedance Measurement IC with Baseline-Canceling Peak Detector.
ISCAS
Asra Malik, Soon-Jae Kweon, Karam Ellahi, Muhammad Abrar Akram, Song-I Cheon, Yoontae Jung, Minkyu Je, Hammad M. Cheema, Sohmyung Ha
2024 C conf
A Hybrid High-voltage Regulating Charge Pump for Electrokinetic Concentration.
ISCAS
Aida Aberra, Muhammad Abrar Akram, Soon-Jae Kweon, Jongmin Kim, Kim-Hoang Nguyen, Gichan Yun, Minkyu Je, Yong-Ak Song, Sohmyung Ha
2024 C conf
A Low-power Δ-ΔΣ-based Bio-impedance Readout IC with Capacitive-feedback Baseline Cancellation.
ISCAS
Haidam Choi, Ji-Hoon Suh, Gichan Yun, Sein Oh, Song-I Cheon, Sohmyung Ha, Minkyu Je
2024 — conf
A Multi-Node Body-Channel-Communication System Using Adaptive Gain Control with ExG Readout ICs for Moving VR Users.
A-SSCC
Dongyoon Lee, Song-I Cheon, Hyungjoo Cho, Seonghyun Park, Jiho Chun, Haidam Choi, Gichan Yun, Yoonsang Cho, Sohmyung Ha, Minkyu Je
2024 C conf
A Reconfigurable Multimodal Sensor Interface IC Based on Direct-Conversion ΔΣ Modulator Structure.
ISCAS
Jimin Koo, Yoontae Jung, Sein Oh, Sunglim Han, Sohmyung Ha, Minkyu Je
2024 C conf
A Tri-loop Fast-transient Digital LDO with Adaptive-gain Control and Fine-loop Freezer.
ISCAS
Muhammad Haris Farooq, Muhammad Abrar Akram, Shirin Qaisar, Soon-Jae Kweon, Hammad M. Cheema, Sohmyung Ha
2024 J jnl
A Wide-Dynamic-Range, DC-Coupled, Time-Based Neural-Recording IC With Optimized CCO Frequency.
IEEE Access
Donghyun Youn, Youngin Kim, Injun Choi, Yoontae Jung, Hyuntak Jeon, Kyungtae Lee, Soon-Jae Kweon, Sohmyung Ha, Minkyu Je
2024 — conf
A Δ-Based Spike Sorting SoC with End-to-End Implementation of Event-Driven Binary Autoencoder Neural Network in Analog CIM Achieving 94.54% Accuracy and 3.11μW/ch.
VLSI Technology and Circuits
Edward Choi, Vincent Lukito, Injun Choi, Seoyoung Lee, Ik-Joon Chang, Sohmyung Ha, Minkyu Je
2024 C conf
An Analog-assisted Fast-transient Digital LDO with a Charge-pump-based Fine Loop Achieving 0.14-mV Output Voltage Ripples.
ISCAS
Shirin Qaisar, Muhammad Abrar Akram, Muhammad Haris Farooq, Soon-Jae Kweon, Hammad M. Cheema, Sohmyung Ha
2024 — conf
An Energy Efficient Period-modulation-based Current-to-digital Converter for FET-type Sensors.
ISOCC
Wonseok Heo, Hoyong Seong, Donghyun Youn, Minkyu Je, Sohmyung Ha
2024 — conf
An Intra-Body-Power-Transfer System Energized by an Electromagnetic Energy Harvester for Powering Wearable Sensor Nodes.
VLSI Technology and Circuits
Hyungjoo Cho, Dongyoon Lee, Hoyong Sung, Heewon Choee, Ji-Hoon Suh, Injun Choi, Donghee Cho, Sohmyung Ha, Minkyu Je
2024 — conf
An SRAM-based Error-Free Time Domain Pulse Train Computing-In-Memory Macro achieving 226.14 TOPS/W and 5.782 TOPS/mm
ISOCC
Edward Jongyoon Choi, Jiho Chun, Byeongseon Choi, Sohmyung Ha, Ik-Joon Chang, Minkyu Je
2024 J jnl
FLARE: FP-Less PTQ and Low-ENOB ADC Based AMS-PiM for Error-Resilient, Fast, and Efficient Transformer Acceleration.
CoRR
Donghyeon Yi, Seoyoung Lee, Jongho Kim, Junyoung Kim, Sohmyung Ha, Ik Joon Chang, Minkyu Je
2024 J jnl
Impedance-Readout Integrated Circuits for Electrical Impedance Spectroscopy: Methodological Review.
IEEE Trans. Biomed. Circuits Syst.
Song-I Cheon, Haidam Choi, Hyoju Kang, Ji-Hoon Suh, Seonghyun Park, Soon-Jae Kweon, Minkyu Je, Sohmyung Ha
2024 J jnl
Optic-Fiber-Based Optogenetic Stimulator With μLED and 3D-Printed Structures for Brain Stimulation.
IEEE Access
Keonghwan Oh, Mohsin Mohammed, Revathi Sukesan, Aleksa Petkovic, Dipesh Chaudhury, Sohmyung Ha
2024 J jnl
Skew-CIM: Process-Variation-Resilient and Energy-Efficient Computation-in-Memory Design Technique With Skewed Weights.
IEEE Trans. Circuits Syst. I Regul. Pap.
Donghyeon Yi, Seoyoung Lee, Injun Choi, Gichan Yun, Edward Jongyoon Choi, Jonghee Park, Jonghoon Kwak, Sung-Joon Jang, Sohmyung Ha, Ik-Joon Chang, Minkyu Je
2024 C conf
Ultrahigh-G Accelerometer Readout IC with Adaptive Gain Path for Shock Resilience.
ISCAS
Song-I Cheon, Seonghyun Park, Haidam Choi, Yebin Choi, Minho Seok, Young-ho Cho, Sohmyung Ha, Minkyu Je
2023 — conf
A 0.9V 2MHz 6.4x-Slope-Boosted Quadrature-Phase Relaxation Oscillator with 164.2dBc/Hz FoM and 62.5ppm Period Jitter in 0.18μm CMOS.
CICC
Hoyong Seong, Donghyun Youn, Injun Choi, Junghyup Lee, Sohmyung Ha, Minkyu Je
2023 — conf
A 187dB FoMS 46fJ/Conv 2
VLSI Technology and Circuits
Yoontae Jung, Sein Oh, Jimin Koo, Seunga Park, Ji-Hoon Suh, Donghee Cho, Sohmyung Ha, Minkyu Je
2023 — conf
A 2.5mW 12MHz-BW 69dB SNDR Passive Bandpass ΔΣ ADC with Highpass Noise-Shaping SAR Quantizers.
VLSI Technology and Circuits
Sein Oh, Seunga Park, Yoontae Jung, Jimin Koo, Donghee Cho, Sohmyung Ha, Minkyu Je
2023 — conf
A 2pA/√Hz Current-Conveyor-Assisted Ultrasound Receiver with 25pF CMUT Parasitic Capacitance.
A-SSCC
Gichan Yun, Kyeongwon Jeong, Haidam Choi, Seunghyeon Nam, Chaerin Oh, Hyunjoo Jenny Lee, Sohmyung Ha, Minkyu Je
2023 — conf
A 333TOPS/W Logic-Compatible Multi-Level Embedded Flash Compute-In-Memory Macro with Dual-Slope Computation.
CICC
Edward Choi, Injun Choi, Vincent Lukito, Dong-Hwi Choi, Donghyeon Yi, Ik-Joon Chang, Sohmyung Ha, Minkyu Je
2023 J jnl
A Differential Rectifier With ${V}_{TH}$ Compensation for High-Frequency RF Inputs.
IEEE Trans. Biomed. Circuits Syst.
Muhammad Abrar Akram, Sohmyung Ha
2023 J jnl
A High-Efficiency Single-Mode Dual-Path Buck-Boost Converter With Reduced Inductor Current.
IEEE J. Solid State Circuits
Donghee Cho, Hyungjoo Cho, Sein Oh, Yoontae Jung, Sohmyung Ha, Chul Kim, Minkyu Je
2023 J jnl
A Process-Scalable Ultra-Low-Voltage Sleep Timer With a Time-Domain Amplifier and a Switch-Less Resistance Multiplier.
IEEE J. Solid State Circuits
Chongsoo Jung, Hoyong Seong, Injun Choi, Sohmyung Ha, Minkyu Je
2023 J jnl
A Wide-Bandwidth Ultrasound Receiver and On-Chip Ultrasound Transmitter for Ultrasound Capsule Endoscopy.
IEEE J. Solid State Circuits
Kyeongwon Jeong, Gichan Yun, Jaesuk Choi, Injun Choi, Jeehoon Son, Jae Youn Hwang, Sohmyung Ha, Minkyu Je
2023 C conf
An Energy-Efficient, Scalable Neural Stimulation IC with Adaptive Dynamic Voltage Switching for Cochlear Implant System.
ISCAS
Woojin Ahn, Kim-Hoang Nguyen, Jungwoo Lim, Kyou Sik Min, Hoseung Lee, Sohmyung Ha, Minkyu Je
2023 J jnl
Optimal Parameter Design of DAC-Based Sinusoidal Signal Generators for Electrical Impedance Spectroscopy.
IEEE Trans. Instrum. Meas.
Song-I Cheon, Soon-Jae Kweon, Aida Aberra, Minkyu Je, Sohmyung Ha
2022 — conf
A 133.6TOPS/W Compute-In-Memory SRAM Macro with Fully Parallel One-Step Multi-Bit Computation.
CICC
Edward Choi, Injun Choi, Chanhee Jeon, Gichan Yun, Donghyeon Yi, Sohmyung Ha, Ik-Joon Chang, Minkyu Je
2022 — conf
A 433.92-MHz CMOS Rectifier with Dynamic VTH-reduction for Wireless Biomedical Implants.
BioCAS
Muhammad Abrar Akram, Sohmyung Ha
2022 — conf
A 600mVPP-Input-Range 94.5dB-SNDR NS-SAR-Nested DSM with 4
VLSI Technology and Circuits
Kyeongwon Jeong, Gichan Yun, Sohmyung Ha, Minkyu Je
2022 — conf
A 96.5%-Power-Efficiency Hybrid Buck-Boost Photovoltaic Energy Harvester Employing Adaptive FOCV MPPT Control for >98% MPPT Efficiency Across a 10, 000× Dynamic Range.
VLSI Technology and Circuits
Phan Dang Hung, Hongseok Shin, Yechan Park, Kim-Hoang Nguyen, Donghee Cho, Sohmyung Ha, Chul Kim, Minkyu Je
2022 J jnl
A PVT-Robust AFE-Embedded Error-Feedback Noise-Shaping SAR ADC With Chopper-Based Passive High-Pass IIR Filtering for Direct Neural Recording.
IEEE Trans. Biomed. Circuits Syst.
Kyeongwon Jeong, Yoontae Jung, Gichan Yun, Donghyun Youn, Yehhyun Jo, Hyunjoo Jenny Lee, Sohmyung Ha, Minkyu Je
2022 — conf
A Single-Mode Dual-Path Buck-Boost Converter with Reduced Inductor Current Across All Duty Cases Achieving 95.58% Efficiency at 1A in Boost Operation.
CICC
Donghee Cho, Hyungjoo Cho, Sein Oh, Yoontae Jung, Sohmyung Ha, Chul Kim, Minkyu Je
2022 J jnl
A Wide-Dynamic-Range Neural-Recording IC With Automatic-Gain-Controlled AFE and CT Dynamic-Zoom ΔΣ ADC for Saturation-Free Closed-Loop Neural Interfaces.
IEEE J. Solid State Circuits
Yoontae Jung, Soon-Jae Kweon, Hyuntak Jeon, Injun Choi, Jimin Koo, Mi Kyung Kim, Hyunjoo Jenny Lee, Sohmyung Ha, Minkyu Je
2022 J jnl
An Impedance Readout IC with Ratio-Based Measurement Techniques for Electrical Impedance Spectroscopy.
Sensors
Song-I Cheon, Soon-Jae Kweon, Youngin Kim, Jimin Koo, Sohmyung Ha, Minkyu Je
2022 J jnl
An Intra-Body Power Transfer System With $>$1-mW Power Delivered to the Load and 3.3-V DC Output at 160-cm of on-Body Distance.
IEEE Trans. Biomed. Circuits Syst.
Hyungjoo Cho, Ji-Hoon Suh, Chul Kim, Sohmyung Ha, Minkyu Je
2022 J jnl
An SRAM-Based Hybrid Computation-in-Memory Macro Using Current-Reused Differential CCO.
IEEE J. Emerg. Sel. Topics Circuits Syst.
Injun Choi, Edward Jongyoon Choi, Donghyeon Yi, Yoontae Jung, Hoyong Seong, Hyuntak Jeon, Soon-Jae Kweon, Ik-Joon Chang, Sohmyung Ha, Minkyu Je
2022 J jnl
Dynamic-Range-Enhancement Techniques for Artifact-Tolerant Biopotential-Acquisition ICs.
IEEE Trans. Circuits Syst. II Express Briefs
Yoontae Jung, Soon-Jae Kweon, Taeju Lee, Kyeongwon Jeong, Sohmyung Ha, Minkyu Je
2022 — conf
Effects of Duration and Envelope of Vibrotactile Alerts on Urgency, Annoyance, and Acceptance.
AsiaHaptics
Ahmed Elsaid, Wanjoo Park, Sohmyung Ha, Yong-Ak Song, Mohamad A. Eid
2022 J jnl
On-Chip Sinusoidal Signal Generators for Electrical Impedance Spectroscopy: Methodological Review.
IEEE Trans. Biomed. Circuits Syst.
Soon-Jae Kweon, Ayesha Kajol Rafi, Song-I Cheon, Minkyu Je, Sohmyung Ha
2022 J jnl
Wireless Kitchen Fire Prevention System Using Electrochemical Carbon Dioxide Gas Sensor for Smart Home.
Sensors
Soon-Jae Kweon, Jeong-Ho Park, Chong-Ook Park, Hyung-Joun Yoo, Sohmyung Ha
2021 — conf
34.4 An Energy-Replenishing Ultrasound Pulser with 0.25CV
ISSCC
Jaesuk Choi, Yechan Park, Jung Bum Oh, Jun-Young Kim, Jae Youn Hwang, Sohmyung Ha, Chul Kim, Minkyu Je
2021 — conf
A 96.6%-Efficiency Continuous-Input-Current Hybrid Dual-Path Buck-Boost Converter with Single-Mode Operation and Non-Stopping Output Current Delivery.
VLSI Circuits
Hongseok Shin, Doojin Jang, Gyeong-Gu Kang, Jinuk Kim, Chul Kim, Sohmyung Ha, Minkyu Je
2021 — conf
A 99.5dB-DR 5kHz-BW Closed-Loop Neural-Recording IC based on Continuous-Time Dynamic-Zoom ΔΣ ADC with Automatic AFE-Gain Control.
A-SSCC
Yoontae Jung, Soon-Jae Kweon, Hyuntak Jeon, Taeju Lee, Injun Choi, Kyeongwon Jeong, Mi Kyung Kim, Hyunjoo Jenny Lee, Sohmyung Ha, Minkyu Je
2021 — conf
A Frequency-Splitting-Based Wireless Power and Data Transfer IC for Neural Prostheses with Simultaneous 115mWPower and 2.5Mb/s Forward Data Delivery.
ISSCC
Yechan Park, Seok-Tae Koh, Jeongeun Lee, Hongkyun Kim, Jaesuk Choi, Sohmyung Ha, Chul Kim, Minkyu Je
2021 — conf
A Load-Current-Regulating OLED Lamp Driver Using a Hybrid Step-Up Converter with 93.21% Efficiency at a High Conversion Ratio of 4.1.
ESSCIRC
Donghee Cho, Hongseok Shin, Hyunwoo Park, Sein Oh, Taeju Lee, Sohmyung Ha, Chul Kim, Minkyu Je
2021 J jnl
A Polar-Demodulation-Based Impedance-Measurement IC Using Frequency-Shift Technique With Low Power Consumption and Wide Frequency Range.
IEEE Trans. Biomed. Circuits Syst.
Song-I Cheon, Soon-Jae Kweon, Youngin Kim, Jimin Koo, Sohmyung Ha, Minkyu Je
2021 C conf
A Power-Efficient, Wide-Frequency-Range Impedance Measurement IC Using Frequency-Shift Technique.
ISCAS
Song-I Cheon, Soon-Jae Kweon, Youngin Kim, Sohmyung Ha, Minkyu Je
2021 J jnl
A Precise Lesion Localization System Using a Magnetometer With Real-Time Baseline Cancellation for Laparoscopic Surgery.
IEEE Access
Soon-Jae Kweon, Woojin Yun, Hyunwoo Park, Jeong-Ho Park, Jung Hoon Lee, Jin Lee, Minkyu Je, Sohmyung Ha, Choul-Young Kim
2021 — conf
A Scalable Readout IC Based on Wideband Noise Cancelling for Full-Rate Scanning of High-Density Microelectrode Arrays.
EMBC
Jinuk Kim, Hongseok Shin, Soon-Jae Kweon, Seongwook Lee, Sohmyung Ha, Minkyu Je
2021 — conf
A Self-Powered Wireless Gas Sensor Node Based on Photovoltaic Energy Harvesting.
VLSI Circuits
Phan Dang Hung, Yechan Park, Soon-Jae Kweon, Taeju Lee, Hyuntak Jeon, Seok-Tae Koh, Incheol Cho, Jun-Bo Yoon, Inkyu Park, Chul Kim, Sohmyung Ha, Minkyu Je
2021 J jnl
A Wireless Power and Data Transfer IC for Neural Prostheses Using a Single Inductive Link With Frequency-Splitting Characteristic.
IEEE Trans. Biomed. Circuits Syst.
Yechan Park, Seok-Tae Koh, Jeongeun Lee, Hongkyun Kim, Jaesuk Choi, Sohmyung Ha, Chul Kim, Minkyu Je
2021 — conf
An 8MHz 31.25kS/s Impedance-Monitoring IC Based on IF-Sampling Architecture with a Band-Pass Delta-Sigma ADC.
VLSI Circuits
Soon-Jae Kweon, Joonho Gil, Chulhyun Park, Sein Oh, Yoontae Jung, Injun Choi, Song-I Cheon, Hung Phan Dang, Ja-Hyuck Koo, Geunhoe Kim, Sohmyung Ha, Minkyu Je
2021 J jnl
Capacitor-Less Dual-Mode All-Digital LDO With ΔΣ-Modulation-Based Ripple Reduction.
IEEE Trans. Circuits Syst. II Express Briefs
Muhammad Abrar Akram, Wook Hong, Sohmyung Ha, In-Chul Hwang
2021 J jnl
Energy-Efficient High-Voltage Pulsers for Ultrasound Transducers.
IEEE Trans. Circuits Syst. II Express Briefs
Jaesuk Choi, Sangyeon Youn, Jae Youn Hwang, Sohmyung Ha, Chul Kim, Minkyu Je
2021 J jnl
Power Delivery Networks for Embedded Mobile SoCs: Architectural Advancements and Design Challenges.
IEEE Access
Muhammad Abrar Akram, In-Chul Hwang, Sohmyung Ha
2020 — conf
A 0.0046mm
VLSI Circuits
Hongseok Shin, Jinuk Kim, Doojin Jang, Donghee Cho, Yoontae Jung, Hyungjoo Cho, Unbong Lee, Chul Kim, Sohmyung Ha, Minkyu Je
2020 C conf
A 4.2-pJ/Conv 10-b Asynchronous ADC with Hybrid Two-Tier Level-Crossing Event Coding.
ISCAS
Rajkumar Kubendran, Jongkil Park, Ritvik Sharma, Chul Kim, Siddharth Joshi, Gert Cauwenberghs, Sohmyung Ha
2020 J jnl
Architectural Advancement of Digital Low-Dropout Regulators.
IEEE Access
Muhammad Abrar Akram, In-Chul Hwang, Sohmyung Ha
2020 J jnl
Challenges in Scaling Down of Free-Floating Implantable Neural Interfaces to Millimeter Scale.
IEEE Access
Kai-Wen K. Yang, Keonghwan Oh, Sohmyung Ha
2019 J jnl
A 3 mm × 3 mm Fully Integrated Wireless Power Receiver and Neural Interface System-on-Chip.
IEEE Trans. Biomed. Circuits Syst.
Chul Kim, Jiwoong Park, Sohmyung Ha, Abraham Akinin, Rajkumar Kubendran, Patrick P. Mercier, Gert Cauwenberghs
2019 — conf
A Fully Differential Potentiostat Circuit with Integrated Time-based ADCs.
BioCAS
Saqib Subhan, Sachin Khapli, Yong-Ak Song, Sohmyung Ha
2019 J jnl
A Fully Integrated RF-Powered Energy-Replenishing Current-Controlled Stimulator.
IEEE Trans. Biomed. Circuits Syst.
Sohmyung Ha, Chul Kim, Jiwoong Park, Gert Cauwenberghs, Patrick P. Mercier
2019 J jnl
A Harmonic Error Cancellation Method for Accurate Clock-Based Electrochemical Impedance Spectroscopy.
IEEE Trans. Biomed. Circuits Syst.
Saqib Subhan, Sohmyung Ha
2018 J jnl
A 500-MHz Bandwidth 7.5-mV
IEEE J. Solid State Circuits
Chul Kim, Chang-Seok Chae, Young-sub Yuk, Chris M. Thomas, Yi-Gyeong Kim, Jong-Kee Kwon, Sohmyung Ha, Gert Cauwenberghs, Gyu-Hyeong Cho
2018 — conf
Harmonic Error Cancellation for Accurate Square-wave-based Bio-Impedance Measurements.
EMBC
Saqib Subhan, Sohmyung Ha
2018 — conf
Magnetically Balanced Power and Data Telemetry for mm-scale Neural Implants.
EMBC
Neeraj K. Mandloi, Sohmyung Ha
2017 — conf
21.7 2pJ/MAC 14b 8×8 linear transform mixed-signal spatial filter in 65nm CMOS with 84dB interference suppression.
ISSCC
Siddharth Joshi, Chul Kim, Sohmyung Ha, Yu Mike Chi, Gert Cauwenberghs
2017 J jnl
A 144-MHz Fully Integrated Resonant Regulating Rectifier With Hybrid Pulse Modulation for mm-Sized Implants.
IEEE J. Solid State Circuits
Chul Kim, Sohmyung Ha, Jiwoong Park, Abraham Akinin, Patrick P. Mercier, Gert Cauwenberghs
2017 — conf
Design of miniaturized wireless power receivers for mm-sized implants.
CICC
Chul Kim, Sohmyung Ha, Abraham Akinin, Jiwoong Park, Rajkumar Kubendran, Hui Wang, Patrick P. Mercier, Gert Cauwenberghs
2017 — conf
From algorithms to devices: Enabling machine learning through ultra-low-power VLSI mixed-signal array processing.
CICC
Siddharth Joshi, Chul Kim, Sohmyung Ha, Gert Cauwenberghs
2017 J jnl
Silicon-Integrated High-Density Electrocortical Interfaces.
Proc. IEEE
Sohmyung Ha, Abraham Akinin, Jiwoong Park, Chul Kim, Hui Wang, Christoph Maier, Patrick P. Mercier, Gert Cauwenberghs
2017 — conf
Wireless powering of mm-scale fully-on-chip neural interfaces.
BioCAS
Jiwoong Park, Chul Kim, Abraham Akinin, Sohmyung Ha, Gert Cauwenberghs, Patrick P. Mercier
2016 J jnl
A 1.3 mW 48 MHz 4 Channel MIMO Baseband Receiver With 65 dB Harmonic Rejection and 48.5 dB Spatial Signal Separation.
IEEE J. Solid State Circuits
Chul Kim, Siddharth Joshi, Chris M. Thomas, Sohmyung Ha, Lawrence E. Larson, Gert Cauwenberghs
2016 — conf
A fully integrated 144 MHz wireless-power-receiver-on-chip with an adaptive buck-boost regulating rectifier and low-loss H-Tree signal distribution.
VLSI Circuits
Chul Kim, Jiwoong Park, Abraham Akinin, Sohmyung Ha, Rajkumar Kubendran, Hui Wang, Patrick P. Mercier, Gert Cauwenberghs
2016 J jnl
Energy Recycling Telemetry IC With Simultaneous 11.5 mW Power and 6.78 Mb/s Backward Data Delivery Over a Single 13.56 MHz Inductive Link.
IEEE J. Solid State Circuits
Sohmyung Ha, Chul Kim, Jongkil Park, Siddharth Joshi, Gert Cauwenberghs
2015 — conf
A 144MHz integrated resonant regulating rectifier with hybrid pulse modulation.
VLSIC
Chul Kim, Sohmyung Ha, Jiwoong Park, Abraham Akinin, Patrick P. Mercier, Gert Cauwenberghs
2015 — conf
A 16-channel wireless neural interfacing SoC with RF-powered energy-replenishing adiabatic stimulation.
VLSIC
Sohmyung Ha, Abraham Akinin, Jongkil Park, Chul Kim, Hui Wang, Christoph Maier, Gert Cauwenberghs, Patrick P. Mercier
2015 — conf
A CMOS 4-channel MIMO baseband receiver with 65dB harmonic rejection over 48MHz and 50dB spatial signal separation over 3MHz at 1.3mW.
VLSIC
Chul Kim, Siddharth Joshi, Chris M. Thomas, Sohmyung Ha, Abraham Akinin, Lawrence E. Larson, Gert Cauwenberghs
2014 — conf
A 12.6 mW 8.3 Mevents/s contrast detection 128×128 imager with 75 dB intra-scene DR asynchronous random-access digital readout.
BioCAS
Jongkil Park, Sohmyung Ha, Chul Kim, Siddharth Joshi, Theodore Yu, Wei Ma, Gert Cauwenberghs
2014 — conf
A 65k-neuron 73-Mevents/s 22-pJ/event asynchronous micro-pipelined integrate-and-fire array transceiver.
BioCAS
Jongkil Park, Sohmyung Ha, Theodore Yu, Emre Neftci, Gert Cauwenberghs
2014 — conf
A 7.86 mW +12.5 dBm in-band IIP3 8-to-320 MHz capacitive harmonic rejection mixer in 65nm CMOS.
ESSCIRC
Chul Kim, Sohmyung Ha, Chris M. Thomas, Siddharth Joshi, Jongkil Park, Lawrence E. Larson, Gert Cauwenberghs
2014 — conf
Energy-recycling integrated 6.78-Mbps data 6.3-mW power telemetry over a single 13.56-MHz inductive link.
VLSIC
Sohmyung Ha, Chul Kim, Jongkil Park, Siddharth Joshi, Gert Cauwenberghs
2014 J jnl
Integrated Circuits and Electrode Interfaces for Noninvasive Physiological Monitoring.
IEEE Trans. Biomed. Eng.
Sohmyung Ha, Chul Kim, Yu M. Chi, Abraham Akinin, Christoph Maier, Akinori Ueno, Gert Cauwenberghs
2013 — conf
85 dB dynamic range 1.2 mW 156 kS/s biopotential recording IC for high-density ECoG flexible active electrode array.
ESSCIRC
Sohmyung Ha, Jongkil Park, Yu M. Chi, Jonathan Viventi, John A. Rogers, Gert Cauwenberghs
2012 — conf
Direct inductive stimulation for energy-efficient wireless neural interfaces.
EMBC
Sohmyung Ha, Massoud L. Khraiche, Gabriel A. Silva, Gert Cauwenberghs