A single-chip 5-V 2400-b/s modem

Author

Levy, Stephen D. ; Hurst, Paul J. ; Ju, Peicheng ; Huggins, John M. ; Cole, Christopher R.

Author_Institution

Silicon Syst. Inc., Nevada City, CA, USA

Volume

25

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

632

Lastpage

643

Abstract

A single-chip split-band 2400-b/s modem has been implemented in a 3-μm CMOS process. A high-level of integration results in a low-cost, high-performance modem. Single-ended analog switched-capacitor circuitry and an application-specific digital signal processor (DSP) combine to perform all modem signal processing. The transmit processing is performed almost entirely in the analog domain. The receiver is performed almost entirely in the analog domain. The IC also supports a number of lower-speed (⩽1200 b/s) split-band modem standards. The chip occupies 68.8 mm² and dissipates 120 mW while operating off a single 5-V supply. System and circuit aspects of the design are discussed, and the measured performance of the IC is summarized

Keywords

CMOS integrated circuits; digital signal processing chips; modems; switched capacitor networks; 120 mW; 2400 bit/s; 5 V; CMOS process; analog switched-capacitor circuitry; application-specific digital signal processor; modem; split-band modem standards; transmit processing; CMOS technology; Cities and towns; Data communication; Digital signal processing; Digital signal processing chips; Digital signal processors; Modems; Silicon; Switched capacitor circuits; Telephony;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.102655

Filename

102655