DocumentCode
2687874
Title
CMOS analog front-end for conversational video phone modem
Author
Solomon, C.W. ; Ozcolak, L. ; Sellani, G. ; Brisco, W.E.
fYear
1989
fDate
15-18 May 1989
Abstract
A description is given of an analog front-end chip relating to a video phone for transmission of audio signals and freeze-frame video images over voice-grade telephone lines. The device is implemented in a 3-μm CMOS process, utilizes switched-capacitor circuit technology and contains major functional blocks, such as a synchronous demodulator, transmit/receive filters, baseband and interpolating filters, an 8-bit digital-to-analog converter, a programmable gain amplifier, and clock and carrier recovery circuits. The chip occupies 27000 mil2 and dissipates 100 mW. System and circuit aspects of the design are discussed
Keywords
CMOS integrated circuits; modems; switched capacitor networks; videotelephony; 100 mW; 3 micron; CMOS analog front-end; audio signals; carrier recovery circuits; conversational video phone modem; digital-to-analog converter; freeze-frame video images; interpolating filters; programmable gain amplifier; switched-capacitor circuit technology; synchronous demodulator; transmit/receive filters; voice-grade telephone lines;
fLanguage
English
Publisher
ieee
Conference_Titel
Custom Integrated Circuits Conference, 1989., Proceedings of the IEEE 1989
Conference_Location
San Diego, CA, USA
Type
conf
DOI
10.1109/CICC.1989.56706
Filename
5726174
Link To Document