A dual-channel voice-band PCM codec using Sigma Delta modulation technique

Author

Friedman, Vladimir ; Brinthaupt, Douglas M. ; Chen, De-ping ; Deppa, Timothy W. ; Elward, John P., Jr. ; Fields, Evelyn M. ; Scott, Jeffrey W. ; Viswanathan, T.R.

Author_Institution

AT&T Bell Lab., Murray Hill, NJ, USA

Volume

24

Issue

2

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

274

Lastpage

280

Abstract

A dual-channel sigma-delta ( Sigma Delta ) voice-band codec meeting AT&T/CCITT specifications is described. Its digital signal processing section has a bit-slice architecture which can be expanded to accommodate higher bit resolution. The active area per channel is 13 mm/sup 2/ in a 1.5- mu m CMOS process. It has only one power supply and the maximum power dissipation is 90 mW per channel. The crosstalk between channels is less than -71 dB.<>

Keywords

CMOS integrated circuits; codecs; delta modulation; pulse-code modulation; 1.5 micron; 90 mW; AT&T specification; CCITT specification; CMOS; active area per channel; bit-slice architecture; channels; crosstalk; digital signal processing section; dual-channel voice-band PCM codec; one power supply; power dissipation; sigma delta codec; sigma delta modulation; CMOS process; Codecs; Crosstalk; Delta-sigma modulation; Digital signal processing; Modulation coding; Phase change materials; Power dissipation; Power supplies; Signal resolution;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.18586

Filename

18586