2024

An Ultralow-Power Triaxial MEMS Accelerometer With High-Voltage Biasing and Electrostatic Mismatch Compensation

Y. Peng; S. Jeong; K. Choo; Y. Kim; L-Y. Chen et al.

Ieee Journal Of Solid-State Circuits. 2024-01-15. DOI : 10.1109/JSSC.2024.3349861.

2023

Energy Efficient Logic and Memory Design With Beyond-CMOS Magnetoelectric Spin-Orbit (MESO) Technology Toward Ultralow Supply Voltage

R. Rothe; H. Li; D. E. Nikonov; I. A. Young; K. Choo et al.

Ieee Journal On Exploratory Solid-State Computational Devices And Circuits. 2023-12-01. Vol. 9, num. 2, p. 124-133. DOI : 10.1109/JXCDC.2023.3322292.

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2022

A Delta Sigma-Modulated Sample and Average Common-Mode Feedback Technique for Capacitively Coupled Amplifiers in a 192-nW Acoustic Analog Front-End

R. Rothe; M. Cho; K. Choo; S. Jeong; S. Oh et al.

Ieee Journal Of Solid-State Circuits. 2022-01-07. Vol. 57, num. 4, p. 1138-1152. DOI : 10.1109/JSSC.2021.3135899.

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2021

An Analog-Assisted Digital LDO With Single Subthreshold Output pMOS Achieving 1.44-fs FOM

L. Xu; K. Choo; D. Blaauw; D. Sylvester

IEEE Solid-State Circuits Letters. 2021. Vol. 4, p. 154-157. DOI : 10.1109/LSSC.2021.3107870.

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A 510-pW 32-kHz Crystal Oscillator With High Energy-to-Noise-Ratio Pulse Injection

L. Xu; T. Jang; J. Lim; K. D. Choo; D. Blaauw et al.

IEEE Journal of Solid-State Circuits. 2021. Vol. 57, num. 2, p. 434-451. DOI : 10.1109/JSSC.2021.3092424.

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Reference Oversampling PLL Achieving −256-dB FoM and −78-dBc Reference Spur

J-H. Seol; K. Choo; D. Blaauw; D. Sylvester; T. Jang

IEEE Journal of Solid-State Circuits. 2021. Vol. 56, num. 10, p. 2993-3007. DOI : 10.1109/JSSC.2021.3089930.

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A 192 nW 0.02 Hz High Pass Corner Acoustic Analog Front-End with Automatic Saturation Detection and Recovery

R. Rothe; M. Cho; K. Choo; S. Jeong; D. Sylvester et al.

2021. Symposium on VLSI Circuits, Kyoto, Japan, 13-19 June 2021. p. 1-2. DOI : 10.23919/VLSICircuits52068.2021.9492374.

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27.2 14.1-ENOB 184.9dB-FoM Capacitor-Array-Assisted Cascaded Charge-Injection SAR ADC

K. Choo; H. An; D. Sylvester; D. Blaauw

2021. IEEE International Solid- State Circuits Conference (ISSCC), San Francisco, CA, USA, 13-22 Feb. 2021. p. 372-374. DOI : 10.1109/ISSCC42613.2021.9365863.

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2020

An Ultra-Low-Power Image Signal Processor for Hierarchical Image Recognition With Deep Neural Networks

H. An; S. Schiferl; S. Venkatesan; T. Wesley; Q. Zhang et al.

IEEE Journal of Solid-State Circuits. 2020. Vol. 56, num. 4, p. 1071-1081. DOI : 10.1109/JSSC.2020.3041858.

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

J-H. Seol; K. Choo; D. Blaauw; D. Sylvester; T. Jang

IEEE Solid-State Circuits Letters. 2020. Vol. 3, p. 430-433. DOI : 10.1109/LSSC.2020.3025142.

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

H. An; S. Venkatesan; S. Schiferl; T. Wesley; Q. Zhang et al.

2020. IEEE Symposium on VLSI Circuits, Honolulu, HI, USA, 16-19 June 2020. p. 1-2. DOI : 10.1109/VLSICircuits18222.2020.9162810.

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

R. Rothe; S. Oh; K. Choo; S. Jeong; M. Cho et al.

2020. IEEE Symposium on VLSI Circuits, Honolulu, HI, USA, 16-19 June 2020. p. 1-2. DOI : 10.1109/VLSICircuits18222.2020.9162804.

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2019

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

L. Xu; T. Jang; J. Lim; K. Choo; D. Blaauw et al.

2019. IEEE International Solid- State Circuits Conference – (ISSCC), San Francisco, CA, USA, 16-20 Feb. 2020. p. 62-64. DOI : 10.1109/ISSCC19947.2020.9062906.

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An Efficient Piezoelectric Energy Harvesting Interface Circuit Using a Sense-and-Set Rectifier

Y. Peng; K. D. Choo; S. Oh; I. Lee; T. Jang et al.

IEEE Journal of Solid-State Circuits. 2019. Vol. 54, num. 12, p. 3348-3361. DOI : 10.1109/JSSC.2019.2945262.

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Energy-Efficient Motion-Triggered IoT CMOS Image Sensor With Capacitor Array-Assisted Charge-Injection SAR ADC

K. D. Choo; L. Xu; Y. Kim; J-H. Seol; X. Wu et al.

IEEE Journal of Solid-State Circuits. 2019. Vol. 54, num. 11, p. 2921-2931. DOI : 10.1109/JSSC.2019.2939664.

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

Y. Peng; D. K. Choo; S. Oh; I. Lee; T. Jang et al.

2019. IEEE International Solid- State Circuits Conference – (ISSCC), San Francisco, CA, USA, 17-21 Feb. 2019. p. 422-424. DOI : 10.1109/ISSCC.2019.8662341.

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

K. D. Choo; L. Xu; Y. Kim; J-H. Seol; X. Wu et al.

2019. IEEE International Solid- State Circuits Conference – (ISSCC), San Francisco, CA, USA, 17-21 Feb. 2019. p. 96-98. DOI : 10.1109/ISSCC.2019.8662306.

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2018

A Noise-Efficient Neural Recording Amplifier Using Discrete-Time Parametric Amplification

T. Jang; J. Lim; K. Choo; S. Nason; J. Lee et al.

IEEE Solid-State Circuits Letters. 2018. Vol. 1, num. 11, p. 203-206. DOI : 10.1109/LSSC.2019.2897866.

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

T. Jang; J. Lim; K. Choo; S. Nason; J. Lee et al.

2018. IEEE Symposium on VLSI Circuits, Honolulu, HI, USA, 18-22 June 2018. p. 237-238. DOI : 10.1109/VLSIC.2018.8502432.

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Pipeline and SAR ADCs for Advanced Nodes

M. P. Flynn; K. Choo; Y. Lim

Hybrid ADCs, Smart Sensors for the IoT, and Sub-1V & Advanced Node Analog Circuit Design; Springer, 2018. p. 297-310.

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2017

A Noise Reconfigurable All-Digital Phase-Locked Loop Using a Switched Capacitor-Based Frequency-Locked Loop and a Noise Detector

T. Jang; S. Jeong; D. Jeon; K. D. Choo; D. Sylvester et al.

IEEE Journal of Solid-State Circuits. 2017. Vol. 53, num. 1, p. 50-65. DOI : 10.1109/JSSC.2017.2776313.

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A Maximum-Likelihood Sequence Detection Powered ADC-Based Serial Link

S. Song; K. D. Choo; T. Chen; S. Jang; M. P. Flynn et al.

IEEE Transactions on Circuits and Systems I: Regular Papers. 2017. Vol. 65, num. 7, p. 2269-2278. DOI : 10.1109/TCSI.2017.2775619.

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A Fully Integrated Counter Flow Energy Reservoir for Peak Power Delivery in Small Form-Factor Sensor Systems

X. Wu; K. Choo; Y. Shi; L-X. Chuo; D. Sylvester et al.

IEEE Journal of Solid-State Circuits. 2017. Vol. 52, num. 12, p. 3155-3167. DOI : 10.1109/JSSC.2017.2734801.

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A 4.7μW switched-bias MEMS microphone preamplifier for ultra-low-power voice interfaces

S. Oh; T. Jang; K. D. Choo; D. Blaauw; D. Sylvester

2017. Symposium on VLSI Circuits, Kyoto, Japan, 5-8 June 2017. p. C314-C315. DOI : 10.23919/VLSIC.2017.8008522.

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A start-up boosting circuit with 133× speed gain for 2-transistor voltage reference

D. Kim; W. Jung; S. Oh; K. D. Choo; D. Sylvester et al.

2017. IEEE Custom Integrated Circuits Conference (CICC), Austin, TX, USA, 30 April-3 May 2017. p. 1-4. DOI : 10.1109/CICC.2017.7993604.

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8.4 A 2.5ps 0.8-to-3.2GHz bang-bang phase- and frequency-detector-based all-digital PLL with noise self-adjustment

T. Jang; S. Jeong; D. Jeon; K. D. Choo; D. Sylvester et al.

2017. IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 5-9 Feb. 2017. p. 148-149. DOI : 10.1109/ISSCC.2017.7870304.

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2016

22.6 A fully integrated counter-flow energy reservoir for 70%-efficient peak-power delivery in ultra-low-power systems

X. Wu; K. Choo; Y. Shi; L-X. Chuo; D. Sylvester et al.

2016. IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 5-9 Feb. 2017. p. 380-381. DOI : 10.1109/ISSCC.2017.7870420.

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27.3 Area-efficient 1GS/s 6b SAR ADC with charge-injection-cell-based DAC

K. D. Choo; J. Bell; M. P. Flynn

2016. IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 31 Jan.-4 Feb. 2016. p. 460-461. DOI : 10.1109/ISSCC.2016.7418106.

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2012

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

J-h. Kim; W-k. Jung; S-h. Lim; Y-j. Park; W-h. Choi et al.

2012. IEEE International Solid-State Circuits Conference, San Francisco, CA, USA, 19-23 Feb. 2012. p. 390-392. DOI : 10.1109/ISSCC.2012.6177060.

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2009

Phase–frequency detecting time-to-digital converter

D-H. Oh; K-J. Choo; D-K. Jeong

Electronics Letters. 2009. Vol. 45, num. 4, p. 201. DOI : 10.1049/el:20093410.

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