A Semi-Digital Delay Locked Loop for Clock Skew Minimization. - Joonbae Park; Yido Koo; Wonchan Kim (VLSI Design, 1999)

An image resolution enhancing technique using adaptive sub-pixel interpolation for digital still camera system. - Yido Koo; Wonchan Kim (IEEE Trans. Consumer Electron., 1999)

A fully integrated CMOS frequency synthesizer with charge-averaging charge pump and dual-path loop filter for PCS- and cellular-CDMA wireless systems. - Yido Koo; Hyungki Huh; Yongsik Cho; Jeongwoo Lee; Joonbae Park; Kyeongho Lee; Deog-Kyoon Jeong; Wonchan Kim (IEEE J. Solid State Circuits, 2002)

Full-CMOS 2-GHz WCDMA direct conversion transmitter and receiver. - Kang-Yoon Lee; Seung-Wook Lee; Yido Koo; Hyoung-Ki Huh; Hee-Young Nam; Jeong-Woo Lee; Joonbae Park; Kyeongho Lee; Deog-Kyoon Jeong; Wonchan Kim (IEEE J. Solid State Circuits, 2003)

Comparison frequency doubling and charge pump matching techniques for dual-band ΔΣ fractional-N frequency synthesizer. - Hyungki Huh; Yido Koo; Kang-Yoon Lee; Yeonkyeong Ok; Sungho Lee; Daehyun Kwon; Jeongwoo Lee; Joonbae Park; Kyeongho Lee; Deog-Kyoon Jeong; Wonchan Kim (IEEE J. Solid State Circuits, 2005)

A 0.25-μm CMOS quad-band GSM RF transceiver using an efficient LO frequency plan. - Eunseok Song; Yido Koo; Yeon-Jae Jung; Deok-Hee Lee; Sangyoung Chu; Soo-Ik Chae (IEEE J. Solid State Circuits, 2005)