Title :
A 125-MHz mixed-signal echo canceller for Gigabit Ethernet on copper wire
Author :
Lee, Tai-Cheng ; Razavi, Behzad
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
3/1/2001 12:00:00 AM
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-μm 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
Keywords :
CMOS integrated circuits; copper; echo suppression; least squares approximations; local area networks; mixed analogue-digital integrated circuits; twisted pair cables; 0.4 micron; 125 MHz; 3 V; 43 mW; CMOS mixed-signal IC; Cu; Gigabit Ethernet; LMS algorithm; copper wire; discrete-time analog front-end; echo canceller; twisted-pair interface; wireline communication; CMOS technology; Circuits; Communication cables; Copper; Crosstalk; Echo cancellers; Ethernet networks; Impedance; Transceivers; Wire;
Journal_Title :
Solid-State Circuits, IEEE Journal of
