Title :
A CMOS processor for a hands-free telephone
Author :
Dermardiros, E. ; Sich, Edward ; Kasbia, P.
Author_Institution :
Bell Northern Research, Ottawa, Canada
Abstract :
The design of a CMOS IC which employs a 5b logarithmic ADC and 46db programmable gain amplifiers for half duplex speaker microphone signal control will be described. The devices reject 50/60Hz power tones and drives a 50-ohm loudspeaker directly.
Keywords :
Band pass filters; CMOS process; Capacitors; Counting circuits; Electronics packaging; Microprocessors; Signal processing; Speech; Switches; Telephony;
Conference_Titel :
Solid-State Circuits Conference. Digest of Technical Papers. 1985 IEEE International
Conference_Location :
New York, NY, USA
DOI :
10.1109/ISSCC.1985.1156803
