Data-Dependent Selection of Amplitude and Phase Equalization in a Quarter-Rate Transmitter for Memory Interfaces | IEEE Journals & Magazine | IEEE Xplore

Data-Dependent Selection of Amplitude and Phase Equalization in a Quarter-Rate Transmitter for Memory Interfaces


Abstract:

We combine 2-tap feed-forward amplitude equalization with phase equalization by 4-tap integrated pulse-width modulation. In a VSS-terminated transmitter, amplitude equali...Show More

Abstract:

We combine 2-tap feed-forward amplitude equalization with phase equalization by 4-tap integrated pulse-width modulation. In a VSS-terminated transmitter, amplitude equalization is selected for pull-up data transmission, and phase equalization for pull-down data transmission, and the strength of equalization can be controlled depending on channel losses. This combines the strength of amplitude equalization with the energy efficiency of phase equalization. A prototype quarter-rate transmitter for memory interfaces, fabricated in a 65nm CMOS process, performed single-ended signaling at a data-rate of 16Gb/s/pin over a channel with a loss of 14.7dB. Its energy efficiency is 1.04pJ/bit/pin and the figure-of-merit is 0.070pJ/bit/pin/dB.
Published in: IEEE Transactions on Circuits and Systems I: Regular Papers ( Volume: 67, Issue: 9, September 2020)
Page(s): 2972 - 2983
Date of Publication: 23 April 2020

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