Title :
A single-chip 2B1Q U-interface transceiver
Author :
Colbeck, Roger P. ; Gervais, Rhéal A. ; Hunt, Geoff ; Ahdab, Ahmad T. ; Kurowski, Christopher W.
Author_Institution :
Mitel Semicond., Kanata, Ont., Canada
fDate :
12/1/1989 12:00:00 AM
Abstract :
A single-chip transceiver designed to meet the American National Standards Institute (ANSI) requirements for the U-interface in the integrated services digital network (ISDN) is described. The device utilizes linear, jitter-compensated, and nonlinear echo cancellation and the 2B1Q line code to achieve high performance in the presence of near-end crosstalk and other impairments. The 2-μm, single-metal, double-polysilicon, 5-V CMOS VLSI chip includes all the necessary analog and digital signal processing blocks for a network-termination of line-termination U-interface to be realized with the addition of a passive-line termination circuit and a transformer. Operation over 4.7 km of 0.4-mm cable or 7.5 km of 0.5-mm cable, with a bit error rate of 10-7, is possible
Keywords :
CMOS integrated circuits; ISDN; VLSI; computerised signal processing; data communication equipment; decoding; digital signal processing chips; echo suppression; encoding; standards; telecommunications computing; transceivers; 2 micron; 2B1Q line code; 5 V; ANSI; American National Standards Institute; CMOS VLSI chip; DSP; ISDN; U-interface transceiver; analogue signal processing; bit error rate; digital signal processing blocks; double-polysilicon; encoding/decoding function; integrated services digital network; jitter-compensated; linear echo cancellation; near-end crosstalk; network-termination; nonlinear echo cancellation; passive-line termination circuit; single-chip transceiver; single-metal; transformer; ANSI standards; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS process; Crosstalk; Digital signal processing chips; Echo cancellers; ISDN; Transceivers; Very large scale integration;
Journal_Title :
Solid-State Circuits, IEEE Journal of
