A 5-V CMOS programmable acoustic front-end for ISDN terminals and digital telephone sets

Author

Nicollini, G. ; Confalonieri, P. ; Crippa, C. ; Pernici, S. ; Mazoyer, Y. ; Dallavalle, C. ; Mariani, S. ; Calloni, A.

Author_Institution

SGS-Thomson Microelectron., Milan, Italy

Volume

29

Issue

9

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

1035

Lastpage

1045

Abstract

A 5-V CMOS programmable acoustic front-end IC for ISDN terminal and digital telephone set applications is presented. The chip performs PCM codec and filter functions, fulfilling all D3/D4 and CCITT specs. Moreover, it implements the main analog interfaces required for the speech channel (low-noise microphone preamplifier, earpiece and loudspeaker drivers, sidetone, antilarsen control) and tone/ring/DTMF generation without external components. The device can be controlled by a microprocessor or a HDLC controller via a four wire separated control interface or by means of a serial control channel multiplexed with the PCM voice/data channel in a GCI compatible format. Chip area is 30 mm ² in a 1.5-μm CMOS technology. The active/stand-by power consumption is 60 mW/0.2 mW from a single 5-V supply. All circuits are designed to meet performance objectives over a voltage range from 4.5 V to 5.5 V and a temperature range from -40°C up to 85°C

Keywords

CMOS integrated circuits; ISDN; codecs; digital communication systems; preamplifiers; pulse-code modulation; switched capacitor filters; telephone sets; -40 to 85 C; 0.2 mW; 1.5 micron; 4.5 to 5.5 V; 5 V; 60 mW; CCITT specs; CMOS technology; D3/D4 specs; GCI compatible format; ISDN terminals; PCM codec functions; PCM filter functions; analog interfaces; antilarsen control; control interface; digital telephone sets; earpiece driver; loudspeaker driver; low-noise microphone preamplifier; programmable acoustic front-end; serial control channel; sidetone control; single 5-V supply; speech channel; tone/ring/DTMF generation; Acoustic applications; Application specific integrated circuits; CMOS digital integrated circuits; CMOS integrated circuits; CMOS technology; Codecs; Filters; ISDN; Phase change materials; Telephony;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.309899

Filename

309899