题目/Title：A 44 Gbps PAM-4 Transmitter with Resistance Feedback 4:1 MUX in 65nm CMOS
作者/Author：
Ziqiang Wang, Dengjie Wang, Xin Wu, Jiawei Wang, Hao Xu, Chun Zhang, Hong Chen, Zhihua Wang
会议/Conference：ICSICT 2022
地点/Location：Nangjing, China
年份/Issue Date：2022.25-28 Oct.
页码/pages：pp.1-3
摘要/Abstract：
This paper presents a power-efficient four-level pulse amplitude modulation (PAM-4) transmitter with 4-tap feed-forward equalizer (FFE) SST driver. A resistance feedback 4:1 MUX is proposed to overcome the bandwidth limit in the last MUX node. The bandwidth is improved more than twice and the jitter is reduced from 7.07ps to 381fs. An absolute delay-based clock distribution network is designed to ensure the timing of the 4:1 MUX. The PAM-4 transmitter is fabricated in 65nm CMOS process and occupies 1.53mm×1.35mm. It delivers a 1.2Vppd PAM-4 signal with RLM of 99% under 1.2V supply and achieves an energy efficiency of 2.27pJ/bit at 44Gbps.