A 16Gb/s 14.7mW tri-band cognitive serial link transmitter with forwarded clock to enable PAM-16 / 256-QAM and channel response detection in 28 nm CMOS

Yuan Du, Wei Han Cho, Yilei Li, Chien Heng Wong, Jieqiong Du, Po-Tsang Huang, Yanghyo Kim, Zuow Zun Chen, Sheau Jiung Lee, Mau-Chung Chang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

A cognitive tri-band transmitter with forwarded clock using multi-band signaling and high-level digital signal modulations is presented for serial link application. The transmitter features learning an arbitrary channel response by sending a sweep of continuous wave, detecting power level, and accordingly adapts modulation scheme, data bandwidth and carrier frequency. The modulation scheme ranges from NRZ/QPSK to PAM-16/256-QAM. The highly re-configurable transmitter is capable of dealing with low-cost serial link cables/connectors or multi-drop buses with deep and narrow notches in frequency domain (e.g. 40dB loss at notches). The adaptive multi-band scheme mitigates equalization requirement and enhances the energy efficiency by avoiding frequency notches and utilizing the maximum available signal-to-noise ratio and channel bandwidth. The implemented transmitter consumes 14.7mW power and occupies 0.016mm2 in 28nm CMOS. It achieves a maximum data rate of 16Gb/s per differential pair and the most energy-efficient FoM (defined in Fig. 8) of 20.4 μW/Gb/s/dB considering channel condition.

Original languageEnglish
Title of host publication2016 IEEE Symposium on VLSI Circuits, VLSI Circuits 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509006342
DOIs
StatePublished - 21 Sep 2016
Event30th IEEE Symposium on VLSI Circuits, VLSI Circuits 2016 - Honolulu, United States
Duration: 14 Jun 201617 Jun 2016

Publication series

NameIEEE Symposium on VLSI Circuits, Digest of Technical Papers
Volume2016-September

Conference

Conference30th IEEE Symposium on VLSI Circuits, VLSI Circuits 2016
CountryUnited States
CityHonolulu
Period14/06/1617/06/16

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