2024
A Review on Integrated RC Frequency References for IoT Applications
W. Choi
IEEE International Conference on Electronics, Information, and Communication (ICEIC), Jan. 2024.
2023
RC Frequency References based on Dual-RC FLLs (Book Chapter)
Y. Chae and W. Choi
Biomedical Electronics, Noise Shaping ADCs, and Frequency References, Springer, Aug. 2023.
A 1,024-Channel, 64-Interconnect, Capacitive Neural Interface Using a Cross-Coupled Microelectrode Array and 2-Dimensional Code-Division Multiplexing
W. Choi*, Y. Chen*, D. Kim*, S. Weaver, T. Schlotter, C. Livanelioglu, J. Liao, R. Incandela, P. Davami, G. Atzeni, S. Arjmandpour, S.-H Cho, and T. Jang (*: Co 1st-Author)
IEEE Symposium on VLSI Technology and Circuits (VLSI), June 2023.
A Highly-Digital PWM-Based Impedance Monitoring IC with 143.2dB DR and 17.7fFrms Resolution
H. Han, W. Choi, J. Kim, J. Sung, H.-J Choi, and Y. Chae
IEEE Symposium on VLSI Technology and Circuits (VLSI), June 2023.
A Compact and PVT-Robust Segmented Duty-Cycled Resistor Realizing TΩ Impedances for Neural Recording Interface Circuits
C. Livanelioglu*, W. Choi*, D. Kim, J. Liao, R. Incandela, and T. Jang (*: Co 1st-Author)
IEEE Solid-State Circuits Letters (L-SSC), vol. 6, pp. 25–28, Jan. 2023.
2022
A Miniaturized Wireless Neural Implant With Body-Coupled Power Delivery and Data Transmission
C. Lee, B. Kim, J. Kim, T. Jeon, W. Choi, S. Yang, J.-H. Ahn, J. Bae, and Y. Chae
IEEE Journal of Solid-State Circuits (JSSC), vol. 57, no. 11, pp. 3212–3227, Nov. 2022.
A 0.9 V 28 MHz Highly Digital CMOS Dual-RC Frequency Reference with ±200 ppm Inaccuracy from -40 °C to 85 °C
W. Choi, J. Angevare, I. Park, K. A. A. Makinwa, and Y. Chae
IEEE Journal of Solid-State Circuits (JSSC), vol. 57, no. 8, pp. 2418–2428, Aug. 2022.
A 0.0014 mm2, 1.18 TΩ Segmented Duty-Cycled Resistor Replacing Pseudo-Resistor for Neural Recording Interface Circuits
C. Livanelioglu*, W. Choi*, D. Kim, J. Liao, R. Incandela, G. Cristiano, and T. Jang (*: Co 1st-Author)
IEEE Symposium on VLSI Technology and Circuits (VLSI), pp. 62–63, June 2022.
A Miniaturized Wireless Neural Implant with Body-Coupled Data Transmission and Power Delivery for Freely Behaving Animals
C. Lee, B. Kim, J. Kim, T. Jeon, W. Choi, S. Yang, J.-H. Ahn, J. Bae, and Y. Chae
IEEE International Solid-State Circuits Conference (ISSCC), pp. 340–341, Feb. 2022.
2021
A 64 × 64 SPAD-based Indirect Time-of-Flight Image Sensor with 2-tap Analog Pulse Counters
B. Park, I. Park, C. Park, W. Choi, Y. Na, M.-J. Lee, and Y. Chae
IEEE Journal of Solid-State Circuits (JSSC), vol. 56, no. 10, pp. 2956–2967, Oct 2021.
A 0.9V 28MHz Dual-RC Frequency Reference with 5pJ/Cycle and ±200ppm Inaccuracy from -40°C to 85°C
W. Choi, J. Angevare, I. Park, K. A. A. Makinwa, and Y. Chae
IEEE International Solid-State Circuits Conference (ISSCC), pp. 434–435, Feb. 2021.
Awarded ISSCC 2021 Takuo Sugano Award for Far-East Outstanding Paper
2020
A 40m-Range 90fps CMOS Time-of-Flight Sensor using SPAD and In-Pixel Time-Gated Pulse Counter
B. Park, I. Park, W. Choi, Y. Na, and Y. Chae
IEEE Solid-State Circuits Letters (L-SSC), vol. 3, no. 11, pp. 422–425, Nov. 2020.
A DTMOST-Based Temperature Sensor with 3σ Inaccuracy of ±0.9°C for Self-Refresh Control in 28nm Mobile DRAM
S. Park, Y. Kim, W. Choi, Y. Lee, S. Kim, Y. Shin, and Y. Chae
IEEE Custom Integrated Circuits Conference (CICC), Mar. 2020.
2019
A 5800μm2 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
Y. Lee, W. Choi, T. Kim, S. Song, K. A. A. Makinwa, and Y. Chae
IEEE Solid-State Circuits Letters (L-SSC), vol. 2, no. 9, pp. 67–70, Sep. 2019.
A 0.02mm2 100dB-DR Impedance Monitoring IC with PWM-Dual GRO Architecture
H. Han, W. Choi, and Y. Chae
IEEE Symposium on VLSI Technology and Circuits (VLSI), pp. C60–C61, June 2019.
A 64×64 APD-Based ToF Image Sensor with Background Light Suppression up to 200 klx Using In-Pixel Auto-Zeroing and Chopping
B. Park, I. Park, W. Choi, and Y. Chae
IEEE Symposium on VLSI Technology and Circuits (VLSI), pp. C256–C257, June 2019.
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
W. Choi, Y. Lee, S. Kim, S. Lee, J. Jang, J. Chun, K. A. A. Makinwa, and Y. Chae
IEEE Journal of Solid-State Circuits (JSSC), vol. 53, no. 12, pp. 3356–3367, Dec. 2018.
A 0.53pJ·K2 7000μm2 Resistor-Based Temperature Sensor with an Inaccuracy of ±0.35°C (3σ) in 65nm CMOS
W. Choi, Y. Lee, S. Kim, S. Lee, J. Jang, J. Chun, K. A. A. Makinwa, and Y. Chae
IEEE International Solid-State Circuits Conference (ISSCC), pp. 322–323, Feb. 2018.
Before 2018
A 1V 7.8mW 15.6Gb/s C-PHY Transceiver Using Tri-Level Signaling for Post-LPDDR4
W. Choi, T. Kim, J. Shim, H. Kim, G. Han, and Y. Chae
IEEE International Solid-State Circuits Conference (ISSCC), pp. 402–403, Feb. 2017.
A 0.02mm2 Embedded Temperature Sensor with ±2°C Inaccuracy for Self-Refresh Control in 25nm Mobile DRAM
Y. Kim, W. Choi, J. Kim, S. Lee, S. Lee, H. Kim, K. A. A. Makinwa, Y. Chae and T. Kim
IEEE European Solid-State Circuits Conference (ESSCIRC), pp. 267–270, Sep. 2015.