Title :
A dual-channel ΣΔ voiceband PCM codec
Author :
Friedman, V. ; Brinthaupt, D.M. ; Chen, D.-P. ; Deppa, T.W. ; Elward, J.P., Jr. ; Fields, E.M. ; Scott, J.W. ; Viswanathan, T.R.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
A dual-channel ΣΔ voiceband codec meeting AT&T/CCITT specifications is described. The active area per channel is 13 mm2 in a 1.5-μm 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; VLSI; codecs; delta modulation; pulse-code modulation; 1.5 micron; 71 dB; 90 mW; AT&T specifications; CCITT specifications; CMOS; VLSI; active area per channel; crosstalk; dual-channel ΣΔ voiceband codec; power dissipation; sigma delta modulation; voiceband PCM codec; Band pass filters; Codecs; Crosstalk; Delta-sigma modulation; Digital filters; Finite impulse response filter; IIR filters; Low pass filters; Phase change materials; Sampling methods;
Conference_Titel :
Custom Integrated Circuits Conference, 1988., Proceedings of the IEEE 1988
Conference_Location :
Rochester, NY
DOI :
10.1109/CICC.1988.20908
