99-dB High-Performance Delta-Sigma Modulator for 20-kHz Bandwidth. - Youngkil Choi; Hyungdong Roh; Hyunseok Nam; Jeongjin Roh (DELTA, 2008)

A 0.9-V 60-µW 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range. - Jeongjin Roh; San-Ho Byun; Youngkil Choi; Hyungdong Roh; Yi-Gyeong Kim; Jong-Kee Kwon (IEEE J. Solid State Circuits, 2008)

Class-D Audio Amplifier Using 1-Bit Fourth-Order Delta-Sigma Modulation. - Kyoungsik Kang; Jeongjin Roh; Youngkil Choi; Hyungdong Roh; Hyunsuk Nam; Songjun Lee (IEEE Trans. Circuits Syst. II Express Briefs, 2008)

A 0.6-V Delta-Sigma Modulator With Subthreshold-Leakage Suppression Switches. - Hyungdong Roh; Hyoungjoong Kim; Youngkil Choi; Jeongjin Roh; Yi-Gyeong Kim; Jong-Kee Kwon (IEEE Trans. Circuits Syst. II Express Briefs, 2009)

A 99-dB DR Fourth-Order Delta-Sigma Modulator for 20-kHz Bandwidth Sensor Applications. - Youngkil Choi; Jeongjin Roh; Hyungdong Roh; Hyunseok Nam; Songjun Lee (IEEE Trans. Instrum. Meas., 2009)

A 0.018% THD+N, 88-dB PSRR PWM Class-D Amplifier for Direct Battery Hookup. - Youngkil Choi; Wonho Tak; Younghyun Yoon; Jeongjin Roh; Sunwoo Kwon; Jinseok Koh (IEEE J. Solid State Circuits, 2012)

A Bufferless Interface for Single-Ended ECM Sensors. - Youngkil Choi; Hyungdong Roh; Jeongjin Roh (IEEE Trans. Instrum. Meas., 2012)

A 1.05A/m Minimum Magnetic Field Strength Single-Chip Fully Integrated Biometric Smart Card SoC Achieving 1014.7ms Transaction Time with Anti-Spoofing Fingerprint Authentication. - Ji-Soo Chang; Eunsang Jang; Youngkil Choi; Moonkyu Song; Sanghyo Lee; Gi-Jin Kang; Junho Kim; Shin-Wuk Kang; Uijong Song; Chang-Yeon Cho; Junseo Lee; Kyungduck Seo; et al. (ISSCC, 2022)

A 1.05-A/m Minimum Magnetic Field Strength Single-Chip, Fully Integrated Biometric Smart Card SoC Achieving 792.5-ms Transaction Time With Anti-Spoofing Fingerprint Authentication. - Ji-Soo Chang; Eunsang Jang; Youngkil Choi; Moonkyu Song; Sanghyo Lee; Gi-Jin Kang; Junho Kim; Uijong Song; Chang-Yeon Cho; Giyeong Ko; Hyunseok Hwang; Junseo Lee; et al. (IEEE J. Solid State Circuits, 2023)