Jaehyouk Choi

Publication Activity (10 Years)

Years Active: 2010-2024
Publications (10 Years): 55

Top Topics

Ellipse Fitting

Adaptive Sampling

Maximally Stable

Top Venues

IEEE J. Solid State Circuits

IEEE Trans. Circuits Syst. II Express Briefs

Publications

Seheon Jang, Munjae Chae, Hangi Park, Chanwoong Hwang, Jaehyouk Choi
10.2 A 5.5μs-Calibration-Time, Low-Jitter, and Compact-Area Fractional-N Digital PLL Using the Recursive-Least-Squares (RLS) Algorithm. ISSCC (2024)
Juyeop Kim, Yongwoo Jo, Hangi Park, Taeho Seong, Younghyun Lim, Jaehyouk Choi
A 12.8-15.0-GHz Low-Jitter Fractional-N Subsampling PLL Using a Voltage-Domain Quantization-Error Cancellation. IEEE J. Solid State Circuits 59 (2) (2024)
Yuhwan Shin, Junseok Lee, Juyeop Kim, Yongwoo Jo, Jaehyouk Choi
10.5 A 76 fsrms- Jitter and -65dBc- Fractional-Spur Fractional-N Sampling PLL Using a Nonlinearity-Replication Technique. ISSCC (2024)
Jeonghyun Lee, Yoonseo Cho, Jintae Kim, Jaehyouk Choi
A 0.009mm2, 6.5mW, 6.2b-ENOB 2.5GS/s Flash-and-VCO-Based Subranging ADC Using a Resistor-Ladder-Based Residue Shifter. CICC (2023)
Yoonseo Cho, Jeonghyun Lee, Suneui Park, Seyeon Yoo, Jaehyouk Choi
A 122fsrms-Jitter and -60dBc-Reference-Spur 12.24GHz MDLL with a 102 - Multiplication Factor Using a Power-Gating Technique. VLSI Technology and Circuits (2023)
Yuhwan Shin, Yongwoo Jo, Juyeop Kim, Junseok Lee, Jongwha Kim, Jaehyouk Choi
-Duty-Cycle Quadrature-Clock Generator for Ultra-Low-Power Clock Distribution in High-Speed DRAM Interfaces. ISSCC (2023)
Byeong-Taek Moon, Sang-Gug Lee, Jaehyouk Choi
A 264-to-287GHz, -2.5dBm Output Power, and -92dBc/Hz 1MHz-Phase-Noise CMOS Signal Source Adopting a 75fsrms Jitter D-Band Cascaded Sub-Sampling PLL. ISSCC (2023)
Yongwoo Jo, Juyeop Kim, Yuhwan Shin, Hangi Park, Chanwoong Hwang, Younghyun Lim, Jaehyouk Choi
A Wideband LO Generator for 5G FR1 Bands Using a Single LC-VCO-Based Subsampling PLL and a Ring-VCO-Based Fractional-Resolution Frequency Multiplier. IEEE J. Solid State Circuits 58 (12) (2023)
Suneui Park, Seyeon Yoo, Yuhwan Shin, Jeonghyun Lee, Jaehyouk Choi
A Sub-100 fs-Jitter 8.16-GHz Ring-Oscillator-Based Power-Gating Injection-Locked Clock Multiplier With the Multiplication Factor of 68. IEEE J. Solid State Circuits 58 (1) (2023)
Yongwoo Jo, Juyeop Kim, Yuhwan Shin, Chanwoong Hwang, Hangi Park, Jaehyouk Choi
A 135fsrms-Jitter 0.6-to-7.7GHz LO Generator Using a Single LC-VCO-Based Subsampling PLL and a Ring-Oscillator-Based Sub-Integer-N Frequency Multiplier. ISSCC (2023)
Jooeun Bang, Jaeho Kim, Seohee Jung, Suneui Park, Jaehyouk Choi
A $47\text{fs}_{\text{rms}}$-Jitter and 26.6mW 103.5GHz PLL with Power-Gating Injection-Locked Frequency-Multiplier-Based Phase Detector and Extended Loop Bandwidth. ISSCC (2023)
Chanwoong Hwang, Hangi Park, Taeho Seong, Jaehyouk Choi
A 188fsrms-Jitter and -243d8-FoMjitter 5.2GHz-Ring-DCO-Based Fractional-N Digital PLL with a 1/8 DTC-Range-Reduction Technique Using a Quadruple-Timing-Margin Phase Selector. ISSCC (2022)
Chanwoong Hwang, Hangi Park, Yongsun Lee, Taeho Seong, Jaehyouk Choi
A Low-Jitter and Low-Fractional-Spur Ring-DCO-Based Fractional-N Digital PLL Using a DTC's Second-/Third-Order Nonlinearity Cancellation and a Probability-Density-Shaping ΔΣM. IEEE J. Solid State Circuits 57 (9) (2022)
Suneui Park, Seojin Choi, Seyeon Yoo, Yoonseo Cho, Jaehyouk Choi
An Ultra-Low Jitter, Low-Power, 102-GHz PLL Using a Power-Gating Injection-Locked Frequency Multiplier-Based Phase Detector. IEEE J. Solid State Circuits 57 (9) (2022)
Younghyun Lim, Juyeop Kim, Yongwoo Jo, Jooeun Bang, Jaehyouk Choi
A Wide-Lock-In-Range and Low-Jitter 12-14.5 GHz SSPLL Using a Low-Power Frequency-Disturbance-Detecting and Correcting Loop. IEEE J. Solid State Circuits 57 (2) (2022)
Hangi Park, Chanwoong Hwang, Taeho Seong, Jaehyouk Choi
A Low-Jitter Ring-DCO-Based Fractional-N Digital PLL With a 1/8 DTC-Range-Reduction Technique Using a Quadruple-Timing-Margin Phase Selector. IEEE J. Solid State Circuits 57 (12) (2022)
Suneui Park, Seyeon Yoo, Yuhwan Shin, Jeonghyun Lee, Jaehyouk Choi
A 97fsrms-Jitter and 68-Multiplication Factor, 8.16GHz Ring-Oscillator Injection-Locked Clock Multiplier with Power-Gating Injection-Locking and Background Multi-Functional Digital Calibrator. ISSCC (2022)
Hangi Park, Chanwoong Hwang, Taeho Seong, Yongsun Lee, Jaehyouk Choi
A 365fsrms-Jitter and -63dBc-Fractional Spur 5.3GHz-Ring-DCO-Based Fractional-N DPLL Using a DTC Second/Third- Order Nonlinearity Cancelation and a Probability-Density-Shaping Δ ΣM. ISSCC (2021)
Wei Deng, Jaehyouk Choi, Wanghua Wu
Session 32 Overview: Frequency Synthesizers Rf Subcommittee. ISSCC (2021)
Seyeon Yoo, Seojin Choi, Yongsun Lee, Taeho Seong, Younghyun Lim, Jaehyouk Choi
A Low-Jitter and Low-Reference-Spur Ring-VCO- Based Injection-Locked Clock Multiplier Using a Triple-Point Background Calibrator. IEEE J. Solid State Circuits 56 (1) (2021)
Jooeun Bang, Seojin Choi, Seyeon Yoo, Jeonghyun Lee, Juyeop Kim, Jaehyouk Choi
A 0.0084-mV-FOM, Fast-Transient and Low-Power External-Clock-Less Digital LDO Using a Gear-Shifting Comparator for the Wide-Range Adaptive Sampling Frequency. ESSCIRC (2021)
Juyeop Kim, Yongwoo Jo, Younghyun Lim, Taeho Seong, Hangi Park, Seyeon Yoo, Yongsun Lee, Seojin Choi, Jaehyouk Choi
32.4 A 104fsrms-Jitter and -61dBc-Fractional Spur 15GHz Fractional-N Subsampling PLL Using a Voltage-Domain Quantization-Error Cancelation Technique. ISSCC (2021)
Seyeon Yoo, Suneui Park, Seojin Choi, Yoonseo Cho, Heein Yoon, Chanwoong Hwang, Jaehyouk Choi
An 82fsrms-Jitter and 22.5mW-Power, 102GHz W-Band PLL Using a Power-Gating Injection-Locked Frequency-Multiplier- Based Phase Detector in 65nm CMOS. ISSCC (2021)
Yongsun Lee, Taeho Seong, Jeonghyun Lee, Chanwoong Hwang, Hangi Park, Jaehyouk Choi
17.1 A -240dB-FoMjitter and -115dBc/Hz PN @ 100kHz, 7.7GHz Ring-DCO-Based Digital PLL Using P/I-Gain Co-Optimization and Sequence-Rearranged Optimally Spaced TDC for Flicker-Noise Reduction. ISSCC (2020)
Younghyun Lim, Juyeop Kim, Yongwoo Jo, Jooeun Bang, Seyeon Yoo, Hangi Park, Heein Yoon, Jaehyouk Choi
17.8 A 170MHz-Lock-In-Range and -253dB-FoMjitter 12-to-14.5GHz Subsampling PLL with a 150µW Frequency-Disturbance-Correcting Loop Using a Low-Power Unevenly Spaced Edge Generator. ISSCC (2020)
Taeho Seong, Yongsun Lee, Chanwoong Hwang, Jeonghyun Lee, Hangi Park, Kyuho Jason Lee, Jaehyouk Choi
17.3 A -58dBc-Worst-Fractional-Spur and -234dB-FoMjitter, 5.5GHz Ring-DCO-Based Fractional-N DPLL Using a Time-Invariant-Probability Modulator, Generating a Nonlinearity-Robust DTC-Control Word. ISSCC (2020)
David T. Blaauw, Hoi Lee, John P. Keane, Jaehyouk Choi, Sudhakar Pamarti
Introduction to the Special Issue on the 2020 IEEE International Solid-State Circuits Conference (ISSCC). IEEE J. Solid State Circuits 55 (12) (2020)
Jeonghyun Lee, Jooeun Bang, Younghyun Lim, Jaehyouk Choi
A 0.5V-VIN, 0.29ps-Transient-FOM, and Sub-2mV-Accuracy Adaptive-Sampling Digital LDO Using Single-VCO-Based Edge-Racing Time Quantizer. VLSI Circuits (2019)
Heein Yoon, Suneui Park, Jaehyouk Choi
A Low-Jitter Injection-Locked Multi-Frequency Generator Using Digitally Controlled Oscillators and Time-Interleaved Calibration. IEEE J. Solid State Circuits 54 (6) (2019)
Taeho Seong, Yongsun Lee, Seyeon Yoo, Jaehyouk Choi
A 320-fs RMS Jitter and - 75-dBc Reference-Spur Ring-DCO-Based Digital PLL Using an Optimal-Threshold TDC. IEEE J. Solid State Circuits 54 (9) (2019)
Seojin Choi, Seyeon Yoo, Yongsun Lee, Yongwoo Jo, Jeonghyun Lee, Younghyun Lim, Jaehyouk Choi
An Ultra-Low-Jitter 22.8-GHz Ring-LC-Hybrid Injection-Locked Clock Multiplier With a Multiplication Factor of 114. IEEE J. Solid State Circuits 54 (4) (2019)
Seyeon Yoo, Seojin Choi, Yongsun Lee, Taeho Seong, Younghyun Lim, Jaehyouk Choi
A 140fsrms-Jitter and -72dBc-Reference-Spur Ring-VCO-Based Injection-Locked Clock Multiplier Using a Background Triple-Point Frequency/Phase/Slope Calibrator. ISSCC (2019)
Juyeop Kim, Heein Yoon, Younghyun Lim, Yongsun Lee, Yoonseo Cho, Taeho Seong, Jaehyouk Choi
A 76fsrms Jitter and -40dBc Integrated-Phase-Noise 28-to-31GHz Frequency Synthesizer Based on Digital Sub-Sampling PLL Using Optimally Spaced Voltage Comparators and Background Loop-Gain Optimization. ISSCC (2019)
Juyeop Kim, Younghyun Lim, Heein Yoon, Yongsun Lee, Hangi Park, Yoonseo Cho, Taeho Seong, Jaehyouk Choi
An Ultra-Low-Jitter, mmW-Band Frequency Synthesizer Based on Digital Subsampling PLL Using Optimally Spaced Voltage Comparators. IEEE J. Solid State Circuits 54 (12) (2019)
Kyoohyun Lim, Sanghoon Lee, Yongha Lee, Byeongmoo Moon, Hwahyeong Shin, Kisub Kang, Seungbeom Kim, Jinhyeok Lee, Hyungsuk Lee, Hyunchul Shim, Chulhoon Sung, Kumyoung Park, Garam Lee, Minjung Kim, Seokyeong Park, Hyosun Jung, Younghyun Lim, Changhun Song, Jaehyeon Seong, Heechang Cho, Jaehyouk Choi, Jong-Ryul Lee, Sangwoo Han
A 65-nm CMOS 2×2 MIMO Multi-Band LTE RF Transceiver for Small Cell Base Stations. IEEE J. Solid State Circuits 53 (7) (2018)
Heein Yoon, Juyeop Kim, Suneui Park, Younghyun Lim, Yongsun Lee, Jooeun Bang, Kyoohyun Lim, Jaehyouk Choi
A -31dBc integrated-phase-noise 29GHz fractional-N frequency synthesizer supporting multiple frequency bands for backward-compatible 5G using a frequency doubler and injection-locked frequency multipliers. ISSCC (2018)
Jiayoon Ru, Jaehyouk Choi, Piet Wambacq
Session 15 overview: RF PLLs: RF subcommittee. ISSCC (2018)
Yongsun Lee, Taeho Seong, Seyeon Yoo, Jaehyouk Choi
A Low-Jitter and Low-Reference-Spur Ring-VCO-Based Switched-Loop Filter PLL Using a Fast Phase-Error Correction Technique. IEEE J. Solid State Circuits 53 (4) (2018)
Taeho Seong, Yongsun Lee, Seyeon Yoo, Jaehyouk Choi
A -242dB FOM and -75dBc-reference-spur ring-DCO-based all-digital PLL using a fast phase-error correction technique and a low-power optimal-threshold TDC. ISSCC (2018)
Yongsun Lee, Taeho Seong, Seyeon Yoo, Jaehyouk Choi
A switched-loop-filter PLL with fast phase-error correction technique. ASP-DAC (2018)
Younghyun Lim, Jeonghyun Lee, Suneui Park, Jaehyouk Choi
An external-capacitor-less high-PSR low-dropout regulator using an adaptive supply-ripple cancellation technique to the body-gate. ASP-DAC (2018)
Seyeon Yoo, Seojin Choi, Juyeop Kim, Heein Yoon, Yongsun Lee, Jaehyouk Choi
Injection-locked frequency multiplier with a continuous frequency-tracking loop for 5G transceivers. ASP-DAC (2018)
Younghyun Lim, Jeonghyun Lee, Yongsun Lee, Seyeon Yoo, Jaehyouk Choi
A 320µV-Output Ripple and 90ns-Settling Time at 0.5V Supply Digital-Analog-Hybrid LDO Using Multi-Level Gate-Voltage Generator and Fast-Decision PD Detector. ESSCIRC (2018)
Younghyun Lim, Jeonghyun Lee, Suneui Park, Yongwoo Jo, Jaehyouk Choi
An External Capacitorless Low-Dropout Regulator With High PSR at All Frequencies From 10 kHz to 1 GHz Using an Adaptive Supply-Ripple Cancellation Technique. IEEE J. Solid State Circuits 53 (9) (2018)
Seyeon Yoo, Seojin Choi, Juyeop Kim, Heein Yoon, Yongsun Lee, Jaehyouk Choi
A Low-Integrated-Phase-Noise 27-30-GHz Injection-Locked Frequency Multiplier With an Ultra-Low-Power Frequency-Tracking Loop for mm-Wave-Band 5G Transceivers. IEEE J. Solid State Circuits 53 (2) (2018)
Seojin Choi, Seyeon Yoo, Yongsun Lee, Yongwoo Jo, Jeonghyun Lee, Younghyun Lim, Jaehyouk Choi
153 FSRMS-Integrated-Jitter and 114-Multiplication Factor PVT-Robust 22.8 GHZ Ring-LC-Hybrid Injection-Locked Clock Multiplier. VLSI Circuits (2018)
Seyeon Yoo, Seojin Choi, Juyeop Kim, Heein Yoon, Yongsun Lee, Jaehyouk Choi
19.2 A PVT-robust -39dBc 1kHz-to-100MHz integrated-phase-noise 29GHz injection-locked frequency multiplier with a 600µW frequency-tracking loop using the averages of phase deviations for mm-band 5G transceivers. ISSCC (2017)
Younghyun Lim, Jeonghyun Lee, Yongsun Lee, Seong-Sik Song, Hong-Teuk Kim, Ockgoo Lee, Jaehyouk Choi
An External Capacitor-Less Ultralow-Dropout Regulator Using a Loop-Gain Stabilizing Technique for High Power-Supply Rejection Over a Wide Range of Load Current. IEEE Trans. Very Large Scale Integr. Syst. 25 (11) (2017)
Younghyun Lim, Jeonghyun Lee, Suneui Park, Jaehyouk Choi
An extemal-capacitor-less low-dropout regulator with less than -36dB PSRR at all frequencies from 10kHz to 1GHz using an adaptive supply-ripple cancellation technique to the body-gate. CICC (2017)
Suneui Park, Heein Yoon, Jaehyouk Choi
An ultra-low phase noise all-digital multi-frequency generator using injection-locked DCOs and time-interleaved calibration. A-SSCC (2017)
Seojin Choi, Seyeon Yoo, Jaehyouk Choi
10.7 A 185fsrms-integrated-jitter and -245dB FOM PVT-robust ring-VCO-based injection-locked clock multiplier with a continuous frequency-tracking loop using a replica-delay cell and a dual-edge phase detector. ISSCC (2016)
Heein Yoon, Yongsun Lee, Younghyun Lim, Geum-Young Tak, Hong-Teuk Kim, Yo-Chuol Ho, Jaehyouk Choi
A 0.56-2.92 GHz Wideband and Low Phase Noise Quadrature LO-Generator Using a Single LC-VCO for 2G-4G Multistandard Cellular Transceivers. IEEE J. Solid State Circuits 51 (3) (2016)
Seojin Choi, Seyeon Yoo, Younghyun Lim, Jaehyouk Choi
A PVT-Robust and Low-Jitter Ring-VCO-Based Injection-Locked Clock Multiplier With a Continuous Frequency-Tracking Loop Using a Replica-Delay Cell and a Dual-Edge Phase Detector. IEEE J. Solid State Circuits 51 (8) (2016)
Yongsun Lee, Heein Yoon, Mina Kim, Jaehyouk Choi
A PVT-robust -59-dBc reference spur and 450-fsRMS jitter injection-locked clock multiplier using a voltage-domain period-calibrating loop. VLSI Circuits (2016)
Mina Kim, Seojin Choi, Taeho Seong, Jaehyouk Choi
A Low-Jitter and Fractional-Resolution Injection-Locked Clock Multiplier Using a DLL-Based Real-Time PVT Calibrator With Replica-Delay Cells. IEEE J. Solid State Circuits 51 (2) (2016)
Donguk Kim, Subin Choi, Jaehyouk Choi, Jae Joon Kim
A Reconfigurable Multiphase $LC$-Ring Structure for Programmable Frequency Multiplication. IEEE Trans. Circuits Syst. II Express Briefs (1) (2015)
Taeho Seong, Jae Joon Kim, Jaehyouk Choi
Analysis and Design of a Core-Size-Scalable Low Phase Noise LC-VCO for Multi-Standard Cellular Transceivers. IEEE Trans. Circuits Syst. I Regul. Pap. (3) (2015)
Mina Kim, Seojin Choi, Jaehyouk Choi
A 450-fs jitter PVT-robust fractional-resolution injection-locked clock multiplier using a DLL-based calibrator with replica-delay-cells. VLSIC (2015)
Yongsun Lee, Mina Kim, Taeho Seong, Jaehyouk Choi
A Low Phase Noise Injection-Locked Programmable Reference Clock Multiplier With a Two-Phase PVT-Calibrator for ΔΣ PLLs. IEEE Trans. Circuits Syst. I Regul. Pap. (3) (2015)
Yesung Kang, Jaehyouk Choi, Youngmin Kim
A Wide-Range On-Chip Leakage Sensor Using a Current-Frequency Converting Technique in 65-nm Technology Node. IEEE Trans. Circuits Syst. II Express Briefs (9) (2015)
Eunji Lim, Youngmin Kim, Jaehyouk Choi
Optimization of analog circuits via simulation and a lagrangian-type gradient-based method. WSC (2015)
Heein Yoon, Yongsun Lee, Jae Joon Kim, Jaehyouk Choi
A Wideband Dual-Mode LC-VCO With a Switchable Gate-Biased Active Core. IEEE Trans. Circuits Syst. II Express Briefs (5) (2014)
Taeho Seong, Yongsun Lee, Jaehyouk Choi
Ultralow In-Band Phase Noise Injection-Locked Frequency Multiplier Design Based on Open-Loop Frequency Calibration. IEEE Trans. Circuits Syst. II Express Briefs (9) (2014)
Yiwu Tang, Jianyun Hu, Jongmin Park, Jaehyouk Choi, Lincoln Leung, Chiewcharn Narathong, Kamal Sahota
A CMOS Highly Linear Hybrid Current/Voltage Controlled Oscillator for Wideband Polar Modulation. IEEE Trans. Circuits Syst. I Regul. Pap. (8) (2013)
Jaehyouk Choi, Woonyun Kim, Kyutae Lim
A Spur Suppression Technique Using an Edge-Interpolator for a Charge-Pump PLL. IEEE Trans. Very Large Scale Integr. Syst. 20 (5) (2012)
Yiwu Tang, Jianyun Hu, Jongmin Park, Jaehyouk Choi, Lincoln Leung, Chiewcharn Narathong, Kamal Sahota
A 65nm CMOS current controlled oscillator with high tuning linearity for wideband polar modulation. CICC (2012)
Jaehyouk Choi, Stephen T. Kim, Woonyun Kim, Kwan-Woo Kim, Kyutae Lim, Joy Laskar
A Low Power and Wide Range Programmable Clock Generator With a High Multiplication Factor. IEEE Trans. Very Large Scale Integr. Syst. 19 (4) (2011)
Taejoong Song, Jongmin Park, Sang Min Lee, Jaehyouk Choi, Kihong Kim, Chang-Ho Lee, Kyutae Lim, Joy Laskar
A 122-mW Low-Power Multiresolution Spectrum-Sensing IC With Self-Deactivated Partial Swing Techniques. IEEE Trans. Circuits Syst. II Express Briefs (3) (2010)
Stephen T. Kim, Jaehyouk Choi, Sungho Beck, Taejoong Song, Kyutae Lim, Joy Laskar
Subthreshold current mode matrix determinant computation for analog signal processing. ISCAS (2010)