Title

2021.02

ISSCC

Charge-domain, Low-power analog

Kyojin Choo, Hyochan An, Dennis Sylvester, David Blaauw

14.1 ENOB 184.9 dB FoM Capacitor Array-Assisted Cascaded Charge-Injection SAR ADC

2020.11

ASSCC

Clocking

Jihwan Seol, Kyojin Choo, David Blaauw, Dennis Sylvester, Taekwang Jang

A 67fsrms Jitter, −130dBc/Hz In-Band Phase Noise, −256dB FoM Reference Oversampling Digital PLL with Proportional Path Timing Control

2020.06

VLSI Symposium

Sensor, Low-power digital, Accelerator

Hyochan An, Siddharth Venkatesan, Sam Schiferl, Tim Wesley, Qirui Zhang, Jingcheng Wang, Kyojin Choo, Shiyu Liu, Bowen Liu, Ziyun Li, Hengfei Zhong, Luyao Gong, David Blaauw, Ronald Dreslinski Jr, Dennis Sylvester, Hun Seok Kim

A 170µW Image Signal Processor Enabling Hierarchical Image Recognition for Intelligence at the Edge

2020.06

VLSI Symposium

Charge-domain, Low-power analog

Rohit Rothe, Sechang Oh, Kyojin Choo, Seok Hyeon Jeong, Minchang Cho, Dennis Sylvester, David Blaauw

Sample and Average Common-Mode Feedback in a 101 nW Acoustic Amplifier

2020.02

ISSCC

Clocking, Low-power analog

Li Xu, Taekwang Jang, Jongyup Lim, Kyojin Choo, David Blaauw, Dennis Sylvester

A 0.51nW 32kHz Crystal Oscillator Achieving 2ppb Allan Deviation Floor Using High-Energy-to-Noise-Ratio Pulse Injection

2019.02

ISSCC

Energy, Low-power analog

Yimai Peng, Kyojin Choo, Sechang Oh, Inhee Lee, Taekwang Jang, Yejoong Kim, Jongyup Lim, Dennis Sylvester, David Blaauw

An Adiabatic Sense and Set Rectifier for Improved Maximum-Power-Point Tracking in Piezoelectric Harvesting with 541% Energy Extraction Gain

2019.02

ISSCC

Charge-domain, Low-power analog, Sensor

Kyojin Choo, Li Xu, Yejoong Kim, Ji-Hwan Seol, Xiao Wu, Dennis Sylvester, David Blaauw

Energy-Efficient Low-Noise CMOS Image Sensor with Capacitor Array-Assisted Charge-Injection SAR ADC for Motion-Triggered Low-Power IoT Applications

2018.06

VLSI Symposium

Charge-domain, Low-power analog, Sensor

Taekwang Jang, Jongyup Lim, Kyojin Choo, S. Nason, J. Lee, S. Oh, S. Jeong, C. Chestek, Dennis Sylvester, David Blaauw

A 2.2 NEF Neural-Recording Amplifier Using Discrete-Time Parametric Amplification

2017.06

VLSI Symposium

Sensor, Low-power analog

Sechang Oh, Taekwang Jang, Kyojin David Choo, David Blaauw, Dennis Sylvester

A 4.7uW Switched-Bias MEMS Microphone Preamplifier for Ultra-Low-Power Voice Interfaces

2017.04

CICC

Low-power analog

Dongkwun Kim, Wanyeong Jung, Sechang Oh, Kyojin David Choo, Dennis Sylvester, David Blaauw

A Start-Up Boosting Circuit with 133x Speed Gain for 2-Transistor Voltage Reference

2017.02

ISSCC

Clocking

Taekwang Jang, Seokhyun Jeong, Dongseok Jeon, Kyojin Choo, Dennis Sylvester, David Blaauw

A 2.5ps 0.8-to-3.2GHz Bang-Bang Phase- and Frequency-Detector-Based All-Digital PLL with Noise Self-Adjustment

2017.02

ISSCC

Charge-domain, Energy, Low-power analog

Xiao Wu, Kyojin Choo, Yao Shi, Li-Xuan Chuo, Dennis Sylvester, David Blaauw

A Fully Integrated Counter-Flow Energy Reservoir for 70%-Efficient Peak-Power Delivery in Ultra-Low-Power Systems

2016.02

ISSCC

Charge-domain, High-speed

Kyojin Choo, John Bell, Michael P. Flynn

Area-efficient 1GS/s 6b SAR ADC with Charge-Injection Cell Based DAC

2012.02

ISSCC

Sensor

J. H. Kim, W. K Jung, S. H. Lim, Y. J. Park, W. H. Choi, Y. J. Kim, C. E. Kang, J. H. Shin, K. J. Choo et al.

A 14b extended counting ADC implemented in a 24Mpixel APS-C CMOS image sensor

2009.03

KCS

Clocking

S. C. Jang, D. S. Kim, H. S. Song, S. G. Lee, K. J. Choo, D. K. Jeong

High-resolution Pulse Generator using Multi-Phase DLL

2009.03

KCS

Clocking

K. J. Choo, D. H. Oh, S. C. Jang, D. K. Jeong

Self-Gain-Normalizing TDC Utilizing Digitally Controlled Phase Interpolator