{"title":"An Adaptive Equalizer for 56 Gb/s PAM4 SerDes","authors":"Miaomiao Wu, Ming-Shiang Lai, Fangxu Lv, Jianjun Shi, Heming Wang, Zheng Wang, Zixiang Tang, Chaolong Xu","doi":"10.1109/ICICM54364.2021.9660321","DOIUrl":null,"url":null,"abstract":"Aiming at the problems of high bit error rate and large channel high-frequency loss in high-speed transmission, an adaptive equalizer suitable for 56 Gb/s PAM4 SerDes is designed. In order to improve the signal transmission bandwidth, PAM4 signal is used instead of NRZ signal. In order to improve the equalization effect, 4-tap FFE is used for pre-emphasis at the transmitter, and a two-stage CTLE is used for coarse equalization at the receiver. Furthermore, digital based 16-tap adaptive FFE and 1-tap adaptive DFE are used at the receiver to further reduce the bit error rate. Simulation results show that the equalizer can work at the rate of 56 Gb/s, and the eye diagram of PAM4 signal is obviously open. Compared with the traditional adaptive equalizer, it can effectively reduce the convergence time and bit error rate.","PeriodicalId":6693,"journal":{"name":"2021 6th International Conference on Integrated Circuits and Microsystems (ICICM)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 6th International Conference on Integrated Circuits and Microsystems (ICICM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICICM54364.2021.9660321","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Aiming at the problems of high bit error rate and large channel high-frequency loss in high-speed transmission, an adaptive equalizer suitable for 56 Gb/s PAM4 SerDes is designed. In order to improve the signal transmission bandwidth, PAM4 signal is used instead of NRZ signal. In order to improve the equalization effect, 4-tap FFE is used for pre-emphasis at the transmitter, and a two-stage CTLE is used for coarse equalization at the receiver. Furthermore, digital based 16-tap adaptive FFE and 1-tap adaptive DFE are used at the receiver to further reduce the bit error rate. Simulation results show that the equalizer can work at the rate of 56 Gb/s, and the eye diagram of PAM4 signal is obviously open. Compared with the traditional adaptive equalizer, it can effectively reduce the convergence time and bit error rate.
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