Title :
A 4-tap 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
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 by 50 taps. 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; data communication equipment; digital communication; echo suppression; least mean squares methods; local area networks; mixed analogue-digital integrated circuits; twisted pair cables; 0.4 micron; 125 MHz; 3 V; 43 mW; ASIC; CMOS technology; Gigabit Ethernet; LMS algorithm; copper wire; discrete-time analog echo canceller; echo suppression; four tap configuration; mixed-signal echo canceller; twisted-pair interface front end; Circuits; Communication cables; Copper; Crosstalk; Echo cancellers; Ethernet networks; Finite impulse response filter; Impedance; Least squares approximation; Transceivers;
Conference_Titel :
Custom Integrated Circuits Conference, 2000. CICC. Proceedings of the IEEE 2000
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5809-0
DOI :
10.1109/CICC.2000.852708
