A 50 Gb/s adaptive dual data-paths NS-EICl ADFE with 50 parallelisms for 2-PAM systems

Chee Kit Ng, Kang Lun Chiu, Yu Chun Lin, Shyh-Jye Jou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A 50Gb/s all-digital adaptive noise-suppression (NS) feed-forward equalizer (AFFE) and adaptive decision feedback equalizer (ADFE) for 2-level pulse amplitude modulation (2-PAM) serial link systems is presented. Based on a parallel extended incremental coefficients-lookahead scheme (EICL), we propose a Dual Data-paths Self-Lookahead Filter (DD-SLF) for ADFE. DD-SLF architecture has better energy efficiency and hardware area than an original SLF architecture due to the number of delay elements in the feedback loop is reduced. Furthermore, gated clock technique with the design idea of register file architecture is used to replace the pipelined delay elements to save power. The whole equalizer which operates at 1GHz system clock rate with 50 parallelisms is implemented in 40nm CMOS technology with a 0.38mm2 core area. The equalizer with 50Gb/s throughput rate achieves 2.6pJ/bit energy efficiency under 0.81V supply measurement results.

Original languageEnglish
Title of host publication2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728103976
DOIs
StatePublished - 1 Jan 2019
Event2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Sapporo, Japan
Duration: 26 May 201929 May 2019

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2019-May
ISSN (Print)0271-4310

Conference

Conference2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019
CountryJapan
CitySapporo
Period26/05/1929/05/19

Keywords

  • 2-PAM digital adaptive decision feedback equalizer
  • Serial link

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    Ng, C. K., Chiu, K. L., Lin, Y. C., & Jou, S-J. (2019). A 50 Gb/s adaptive dual data-paths NS-EICl ADFE with 50 parallelisms for 2-PAM systems. In 2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings [8702554] (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2019-May). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2019.8702554