A segmented /spl mu/-255 law PCM voice encoder utilizing NMOS technology

Author

Tsividis, Yannis P. ; Gray, Paul R. ; Hodges, David A. ; Chacko, Jacob, Jr.

Volume

11

Issue

6

fYear

1976

Firstpage

740

Lastpage

747

Abstract

A technique for pulse code modulation (PCM) encoding according to the 15-segment approximation to the /spl mu/-255 nonlinear encoding law is described. The technique makes possible the realization of a one-channel encoder together with the associated sample/hold function as a single NMOS integrated circuit. The requirements imposed on the individual components for satisfactory system performance are investigated, and it is shown that a performance can be achieved which is comparable with that required in toll quality PCM telephone transmission. Experimental results from a partially integrated prototype are presented.

Keywords

Digital communication systems; Encoding; Field effect integrated circuits; Large scale integration; Pulse-code modulation; Telephone equipment; Voice communication; digital communication systems; encoding; field effect integrated circuits; large scale integration; pulse-code modulation; telephone equipment; voice communication; Analog-digital conversion; Decoding; Encoding; Jacobian matrices; Laboratories; MOS capacitors; MOS devices; Phase change materials; Pulse modulation; Transversal filters;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.1976.1050812

Filename

1050812