A 1.58 pJ/b 9 G bps Reference-Less Clock and Data Recovery Circuit With Sigma Range Detector. - Jongchan An; Seung-Myeong Yu; Gwangmyeong An; Songi Cheon; Hyunsu Jang; Junyoung Song (IEEE Trans. Circuits Syst. II Express Briefs, 2025)