A 4-PAM Adaptive Analog Equalizer for Backplane Interconnections
Journal
IEEE VLSI-DAT
Pages
200-203
Date Issued
2008-04
Author(s)
Abstract
Increasing of data rate has created a major challenge for electronic circuits used at the interface of the backplane physical layer links. As the data rate increases above Gb/s, intersymbol interference (ISI) becomes a critical issue in received signal quality, limiting the achievable transmission speed and distance over channels. A 4-PAM (pulse amplitude modulation) adaptive analog equalizer is proposed to compensate the FR-4 PCB backplane interconnections by using a sum-feedback filter (SFF), relaxing the design requirement of the conventional analog feed-forward equalizers (FFE). Fabricated in a 0.13-μm digital CMOS technology, the analog equalizer recovers 14 Gb/s random data transmitted over FR-4 PCB copper channels.
SDGs
Type
conference paper