A single-chip CMOS PCM codec
- 1 February 1979
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Solid-State Circuits
- Vol. 14 (1) , 54-59
- https://doi.org/10.1109/JSSC.1979.1051141
Abstract
Describes a single-chip full duplex per channel PCM codec implemented in a metal gate CMOS process. An 8-bit companding DAC, a novel autozeroed analog subsystem, and a 3.5-MHz frame interface control logic comprise the 175/spl times/195-mil integrated circuit. The DAC is implemented with matched n channel devices and utilizes redundancy and feedback to achieve the required accuracy. The analog subsystem contains two sample and hold circuits, autozeroing circuitry, CMOS amplifiers, and a fast CMOS comparator.Keywords
This publication has 2 references indexed in Scilit:
- A monolithic companding D/A converterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1977
- A CMOS monolithic 3½-digit A/D converterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1976