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Integration of a CMOS mixed-analog-digital eight channel speech transmission circuit

: Cepl, F.; Deierling, A.; Duffner, O.; Hauer, H.; Seitzer, D.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE Custom Integrated Circuits Conference 1990. Proceedings : Boston, Massachusetts, May 13 - 16, 1990
New York/N.Y.: IEEE Order Department, 1990
Custom Integrated Circuits Conference (CICC) <12, 1990, Boston/Mass.>
Conference Paper
Fraunhofer IIS A ( IIS) ()
CMOS; communication; Einseitenbandsignal; gemischt analog-digital; Heimautomatisierung; home automation; IC; Kommunikation; mixed analog-digital; signal transmission; Signalübertragung; single side band modulation; speech transmission; Sprachübertragung

An eight channel speech transmission circuit with single sideband (SSB) modulation has been developed. The circuit includes signal amplifiers, various modulators and filters. Clocks for the switched capacitor filters, the modulators and the external controller are derived from the integrated oscillator. With a few additional components it is possible to build communication devices which can be combined to systems of more than 100 stations. The IC has been integrated in a 3 mu m double poly process.