A 56Gb/s PAM-4 Transmitter with Robust DCC and Unsegmented Voltage-Mode Driver Achieving Wide-Coefficient-Tuning-Range FFE in 65nm CMOS. - Lihong Yang; Zhongji Zhang; Xiaoteng Zhao; Zhao Song; Zixing Luo; Zhangming Zhu (ISCAS, 2026)