A 125-MHz mixed-signal echo canceller for Gigabit Ethernet on copper wire
Journal
IEEE Journal of Solid-State Circuits
Journal Volume
36
Journal Issue
3
Pages
366-373
Date Issued
2001
Author(s)
Abstract
A discrete-time analog echo canceller is described that reduces the echo in the front end of Gigabit Ethernet twisted-pair interfaces. Echo cancellation in the analog domain by means of four taps reduces the complexity of the digital echo canceller and crosstalk cancellers. Designed in a 0.4-/spl mu/m CMOS technology, the circuit employs an LMS algorithm to adapt to the cable length and impedance discontinuities, providing an echo suppression of 10 dB. The design operates at 125 MHz while consuming 43 mW from a 3-V supply.
SDGs
Type
journal article