A continuously variable slope adaptive delta modulation codec system

Author

Gregorian, Roubik ; Gord, John G.

Volume

18

Issue

6

fYear

1983

Firstpage

692

Lastpage

700

Abstract

The author describes a CMOS single-chip monolithic adaptive delta modulation coder/decoder (codec). The codec uses a 56 kHz sample rate and is implemented with novel switched-capacitor circuits. The simplicity and efficiency of the encoding/decoding scheme allows the inclusion of several other functions on the chip, including a dual-tone multifrequency generator and and an 8-step programmable attenuator. These features make it especially suitable for private automatic branch exchange (PABX) applications. Experimental results are presented that show the circuit meets the necessary systems requirement for all usual applications.

Keywords

Codecs; Delta modulation; Digital integrated circuits; Field effect integrated circuits; Linear integrated circuits; Private telephone exchanges; Switched capacitor networks; Telephone equipment; codecs; delta modulation; digital integrated circuits; field effect integrated circuits; linear integrated circuits; private telephone exchanges; switched capacitor networks; telephone equipment; Attenuators; Codecs; Decoding; Delta modulation; Encoding; Headphones; Phase change materials; Pulse modulation; Switched capacitor circuits; Switching circuits;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.1983.1052019

Filename

1052019