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

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)

DC-DC switching converter with positive and negative outputs for active-matrix LCD bias. - Hyunseok Nam; Inseok Kim; Youngkook Ahn; Jeongjin Roh (IET Circuits Devices Syst., 2010)