A 32-Gb/s 0.89-pJ/b Ground-Referenced PAM-4/NRZ Transceiver with Unidirectional Current Summation and Double Sampling. - Wonbin Lee; Jae-Seung Jeong; Hyunmin Shin; In-Woo Jang; Namhoon Kim; Kyeongha Kwon (CICC, 2026)