A subscriber digital signal processor LSI for PCM applications

Author

Yamakido, Kazuo ; Kokubo, Masaru ; Kozaki, Takahiko ; Nishita, Shigeo ; Nishihara, Tatsuya ; Miyake, Norio ; Ohwada, Ken´ichi

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

23

Issue

3

fYear

1988

fDate

6/1/1988 12:00:00 AM

Firstpage

836

Lastpage

842

Abstract

A single-chip subscriber digital signal processor LSI (SDP) having programmable codec functions, which utilizes oversampling conversions and digital signal-processing techniques, is described. The chip is fabricated using a standard 2- mu m CMOS technology, and integrates many additional functions for PCM (pulse-code modulation) applications, such as gain control, an autobalancing network, a three-party conference, and a metering signal circuit, which are controlled by a software program. Excellent system characteristics and low power dissipation are achieved with operation from a single +5-V power supply.<>

Keywords

CMOS integrated circuits; codecs; computerised signal processing; digital communication systems; large scale integration; microcomputer applications; microprocessor chips; pulse-code modulation; signal processing equipment; subscriber loops; telecommunications computing; 2 micron; 5 V; CMOS technology; LSI; PCM applications; autobalancing network; gain control; low power dissipation; metering signal circuit; oversampling conversions; programmable codec functions; pulse-code modulation; single chip DSP; single power supply; software program; subscriber digital signal processor; three-party conference; CMOS technology; Codecs; Digital signal processors; Large scale integration; Phase change materials; Pulse circuits; Pulse modulation; Pulsed power supplies; Signal processing; Software standards;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.327

Filename

327