Title :
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
fDate :
4/1/1989 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
