Title :
Integration of a CMOS mixed-analog-digital eight channel speech transmission circuit
Author :
Cepl, F. ; Deierling, A. ; Duffner, O. ; Hauer, H. ; Seitzer, D.
Author_Institution :
Fraunhofer Gesellschaft/Arbeitsgrupper fuer Integrierte Shaltungen, Erlangen, West Germany
Abstract :
An eight-channel speech transmission circuit with single sideband 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 μm double-poly process
Keywords :
CMOS integrated circuits; amplifiers; application specific integrated circuits; frequency division multiplexing; switched capacitor filters; transceivers; 3 micron; CMOS; SSB modulation; double-poly process; eight-channel speech transmission circuit; integrated oscillator; mixed mode ASIC; mixed-analog-digital; signal amplifiers; single sideband modulation; switched capacitor filters; Capacitors; Circuits; Clocks; Communication system control; Filters; Frequency; Microphones; Oscillators; Signal processing; Speech;
Conference_Titel :
Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990
Conference_Location :
Boston, MA
DOI :
10.1109/CICC.1990.124718
