A 100-Gb/s PAM-4 CTLE in 28-nm CMOS with Coarse-Fine Gain Adjustment

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Abstract

A 100-Gb/s continuous time linear equalizer (CTLE) for four-level pulse-amplitude modulation (PAM-4) in a 28-nm CMOS process is presented. The proposed CTLE provides peaking at Nyquist frequency, as well as peaking at mid-frequency for low-frequency channel-loss compensation. In addition, this design offers a coarse-fine tuning gain adjustment. The dc gain covers a wide range from -9dB to 12 dB with step size of less than 0.3 dB, and the peaking gain at Nyquist frequency can be adjusted from -3.4dB to 20 dB with a step size of less than 1.2 dB. The CTLE consumes 54-mW from a 0.9-V supply.

Original languageEnglish
Title of host publicationProceedings of 2020 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages92-93
Number of pages2
ISBN (Electronic)9781728180328
DOIs
StatePublished - 23 Nov 2020
Event3rd IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020 - Virtual, Nanjing, China
Duration: 23 Nov 202025 Nov 2020

Publication series

NameProceedings of 2020 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020

Conference

Conference3rd IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2020
Country/TerritoryChina
CityVirtual, Nanjing
Period23/11/2025/11/20

Keywords

  • CTLEJ PAM-4
  • gain adjustment

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