A 0.02mm2 embedded temperature sensor with ±2°C inaccuracy for self-refresh control in 25nm mobile DRAM. - Yeo Myung Kim; Woojun Choi; Jaehoon Kim; Sanghoon Lee 009; Sangho Lee; Hyeongon Kim; Kofi A. A. Makinwa; Youngcheol Chae; Tae Wook Kim (ESSCIRC, 2015)

23.8 A 1V 7.8mW 15.6Gb/s C-PHY transceiver using tri-level signaling for post-LPDDR4. - Woojun Choi; Taewoong Kim; Jongjoo Shim; Hyungsoo Kim; Gunhee Han; Youngcheol Chae (ISSCC, 2017)

A 0.53pJK2 7000μm2 resistor-based temperature sensor with an inaccuracy of ±0.35°C (3σ) in 65nm CMOS. - Woojun Choi; Yong-Tae Lee; Seonhong Kim; Sanghoon Lee 009; Jieun Jang; Junhyun Chun; Kofi A. A. Makinwa; Youngcheol Chae (ISSCC, 2018)

A Compact Resistor-Based CMOS Temperature Sensor With an Inaccuracy of 0.12 °C (3σ) and a Resolution FoM of 0.43 pJ⋅K2 in 65-nm CMOS. - Woojun Choi; Yong-Tae Lee; Seonhong Kim; Sanghoon Lee 009; Jieun Jang; Junhyun Chun; Kofi A. A. Makinwa; Youngcheol Chae (IEEE J. Solid State Circuits, 2018)

A 5800-μm2 Resistor-Based Temperature Sensor With a One-Point Trimmed Inaccuracy of ±1.2 °C (3σ) From -50 °C to 105 °C in 65-nm CMOS. - Yong-Tae Lee; Woojun Choi; Taewoong Kim; Seung-Woo Song; Kofi A. A. Makinwa; Youngcheol Chae (ESSCIRC, 2019)

Harmonic Based Diagnostics for Aging Lithium-Ion Battery. - Seon Hyeog Kim; Hyeong Min Lee; Gu-Young Kwon; Injun Park; Woojun Choi; Youngcheol Chae; Yong-June Shin (ISIE, 2019)

A 0.02mm2 100dB-DR Impedance Monitoring IC with PWM-Dual GRO Architecture. - Hyeonho Han; Woojun Choi; Youngcheol Chae (VLSI Circuits, 2019)

A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping. - Byungchoul Park; Injun Park; Woojun Choi; Youngcheol Chae (VLSI Circuits, 2019)

A DTMOST-based Temperature Sensor with 3σ Inaccuracy of ±0.9°C for Self-Refresh Control in 28nm Mobile DRAM. - Sungsik Park; Yunhong Kim; Woojun Choi; Yong-Tae Lee; Sungbeen Kim; Youngmin Shin; Youngcheol Chae (CICC, 2020)

31.2 A 0.9V 28MHz Dual-RC Frequency Reference with 5pJ/Cycle and ±200 ppm Inaccuracy from -40°C to 85°C. - Woojun Choi; Jan A. Angevare; Injun Park; Kofi A. A. Makinwa; Youngcheol Chae (ISSCC, 2021)

A 64 × 64 SPAD-Based Indirect Time-of-Flight Image Sensor With 2-Tap Analog Pulse Counters. - Byungchoul Park; Injun Park; Chanmin Park; Woojun Choi; Yoondeok Na; Myung-Jae Lee; Youngcheol Chae (IEEE J. Solid State Circuits, 2021)

A Miniaturized Wireless Neural Implant with Body-Coupled Data Transmission and Power Delivery for Freely Behaving Animals. - Changuk Lee; Byeongseol Kim; Jejung Kim; Sangwon Lee; Taejune Jeon; Woojun Choi; Sunggu Yang; Jong-Hyun Ahn; Joonsung Bae; Youngcheol Chae (ISSCC, 2022)

A 0.0014 mm2, 1.18 TΩ Segmented Duty-Cycled Resistor Replacing Pseudo-Resistor for Neural Recording Interface Circuits. - Can Livanelioglu; Woojun Choi; Donghwan Kim; Jiawei Liao; Rosario M. Incandela; Giorgio Cristiano; Taekwang Jang (VLSI Technology and Circuits, 2022)

A 0.9-V 28-MHz Highly Digital CMOS Dual-RC Frequency Reference With ±200 ppm Inaccuracy From -40 °C to 85 °C. - Woojun Choi; Jan A. Angevare; Injun Park; Kofi A. A. Makinwa; Youngcheol Chae (IEEE J. Solid State Circuits, 2022)

A Miniaturized Wireless Neural Implant With Body-Coupled Power Delivery and Data Transmission. - Changuk Lee; Byeongseol Kim; Jejung Kim; Sangwon Lee; Taejune Jeon; Woojun Choi; Sunggu Yang; Jong-Hyun Ahn; Joonsung Bae; Youngcheol Chae (IEEE J. Solid State Circuits, 2022)

A 1, 024-Channel, 64-Interconnect, Capacitive Neural Interface Using a Cross-Coupled Microelectrode Array and 2-Dimensional Code-Division Multiplexing. - Woojun Choi; Yiyang Chen; Donghwan Kim; Sean Weaver; Tilman Schlotter; Can Livanelioglu; Jiawei Liao; Rosario M. Incandela; Parham Davami; Gabriele Atzeni; Sina Arjmandpour; SeongHwan Cho; et al. (VLSI Technology and Circuits, 2023)

A Highly-Digital PWM-Based Impedance Monitoring IC with 143.2dB DR and 17.7fFrms Resolution. - Hyeonho Han; Woojun Choi; Jaehyun Kim; Jaesuk Sung; Heonjin Choi; Youngcheol Chae (VLSI Technology and Circuits, 2023)

A Review on Integrated RC Frequency References for IoT Applications. - Woojun Choi (ICEIC, 2024)