A CMOS Transceiver for a Multistandard 13.56-MHz RFID Reader SoC. - Young-Han Kim 002; Yong-Chang Choi; Min-Woo Seo; Sang-Sun Yoo; Hyung-Joun Yoo (IEEE Trans. Ind. Electron., 2010)

A 0.7-MHz-10-MHz CT+DT Hybrid Baseband Chain With Improved Passband Flatness for LTE Application. - Soo-Hwan Shin; Soon-Jae Kweon; Seong-Hun Jo; Yong-Chang Choi; Sangyoub Lee; Hyung-Joun Yoo (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

An efficient, wide range time-to-digital converter using cascaded time-interpolation stages for electrical impedance spectroscopy. - Seongheon Shin; Soon-Jae Kweon; Jeong-Ho Park; Yong-Chang Choi; Hyung-Joun Yoo (APCCAS, 2016)

A fully-digital phase modulator with phase calibration loop for high data-rate systems. - Yong-Chang Choi; Sang-Sun Yoo; Hyung-Joun Yoo (ISOCC, 2017)

A Fully Digital Phase Modulator With a Highly Linear Phase Calibration Loop for Wideband Polar Transmitters. - Yong-Chang Choi; Mauricio Velazquez Lopez; Sounghun Shin; Sang-Sun Yoo; Hyung-Joun Yoo (IEEE Trans. Circuits Syst. II Express Briefs, 2019)