Digitally tuneable on-chip resistor in CMOS for high-speed data transmission. - Kyoung-Hoi Koo; Jin-Ho Seo; Jae-Whui Kim (ISCAS (1), 2003)

A new level shifter in ultra deep sub-micron for low to wide range voltage applications. - Kyoung-Hoi Koo; Jin-Ho Seo; Myeong-Lyong Ko; Jae-Whui Kim (SoCC, 2004)

A new level-up shifter for high speed and wide range interface in ultra deep sub-micron. - Kyoung-Hoi Koo; Jin-Ho Seo; Myeong-Lyong Ko; Jae-Whui Kim (ISCAS (2), 2005)

A versatile I/O with robust impedance calibration for various memory interfaces. - Kyoung-Hoi Koo; Soo-Kyung Lee; Jin-Ho Seo; Myeong-Lyong Ko; Jae-Whui Kim (ISCAS, 2006)