An analog interface circuit (AIC) for high-speed modems

Author

Wong, Steve ; Titizer, Korhan ; Fotouhi, Bahram ; Gregorian, Roubik

Author_Institution

Sierra Semicond. Corp., San Jose, CA, USA

fYear

1988

fDate

16-19 May 1988

Abstract

An analog interface circuit (AIC) is described that can be used with a digital signal-processing element to implement high-speed (up to 14-kHz) modems. It includes receive/transmit functions, an auxiliary DAC (digital-to-analog converter), audio monitoring, call progress tone detection, loopbacks, and a hybrid function. The chip is fabricated using a 3-μm double-polysilicon CMOS n-well process. It is housed in a 28-pin package and the die size measures 225 mils×238 mils. It uses ±5.0±0.5 V power supply and consumes 150 mW of power at 10 V. The transmit and receive filters have a PSRR (power supply rejection ratio) of 35 dB at 1 kHz and the idle channel noise (measured by grounding the filter input) of 10 dBrnCo

Keywords

CMOS integrated circuits; digital-analogue conversion; linear integrated circuits; modems; 150 mW; 3 micron; 5 V; PSRR; analog interface circuit; audio monitoring; auxiliary DAC; call progress tone detection; die size; digital signal-processing element; double-polysilicon CMOS n-well process; high-speed modems; hybrid function; idle channel noise; loopbacks; power supply rejection ratio; receive/transmit functions; CMOS process; Circuits; Digital-analog conversion; Filters; Modems; Monitoring; Packaging; Power supplies; Semiconductor device measurement; Size measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1988., Proceedings of the IEEE 1988

Conference_Location

Rochester, NY

Type

conf

DOI

10.1109/CICC.1988.20939

Filename

20939