CMOS analog front end of a transceiver with digital echo cancellation for ISDN

Author

Roessler, Bernward ; Wolter, Eberhard

Author_Institution

Siemens AG, Munich, West Germany

Volume

23

Issue

2

fYear

1988

fDate

4/1/1988 12:00:00 AM

Firstpage

311

Lastpage

317

Abstract

A CMOS analog front-end which contains a novel pulse-shaping circuit, an extremely linear-line-driver state, an oversampling second-order noise-shaping coder, and a wake-up signal detector is discussed. An analog front-end for 4B 3T coded signals is realized in a 2.5-μm CMOS technology and operates up to 4.5 km with 0.4-mm-diameter lines, needing only one 5-V power supply. It is possible to transmit 2B 1Q coded signals also, using a modified pulse-shaping circuit

Keywords

CMOS integrated circuits; ISDN; echo suppression; transceivers; 0.4 mm; 2.5 micron; 2B 1Q coded signals; 4.5 km; 4B 3T coded signals; 5 V; ASIC; CMOS analog front-end; ISDN; custom ICs; digital echo cancellation; linear-line-driver; one 5-V power supply; oversampling second-order noise-shaping coder; pulse-shaping circuit; transceiver; wake-up signal detector; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS technology; Capacitors; Detectors; Echo cancellers; ISDN; Noise shaping; Power supplies; Pulse amplifiers; Pulse circuits; Pulse shaping methods; Pulsed power supplies; Signal detection; Signal processing; Transceivers;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.989

Filename

989