A 125-MHz Mixed-Signal Equalizer for Gigabit Ethernet on Copper Wire
Journal
IEEE Custom Integrated Circuits Conference
Pages
131-134
Date Issued
2001-05
Author(s)
B. Razavi
Abstract
A discrete-time mixed-signal linear equalizer designed for the analog front end of Gigabit Ethernet receivers performs cable equalization while relaxing the A/D converter complexity. Based on a coefficient-rotating FIR filter architecture, the circuit incorporates 8 taps that are adapted to the cable characteristics by means of an LMS algorithm. A distributed array of interleaved sampling circuits and a linear low-voltage multiplier topology allow both high speed and low power dissipation. Fabricated in a 0.25-/spl mu/m digital CMOS technology, the equalizer operates at 125 MHz while dissipating 75 mW from a 2.5-V power supply.
SDGs
Type
conference paper