Title :
A two chip PCM voice CODEC with filters
Author :
Haque, Yusuf A. ; Gregorian, Roubik ; Blasco, Richard W. ; Mao, Roger A. ; Nicholson, William E., Jr.
Abstract :
Architecture and design of a monolithic voice CODEC is described. The CODEC consists of 2 chips-the transmit chip includes the companding coder (nonlinear A/D) along with filtering functions, and the receive chip consists of the expanding decoder (nonlinear D/A) chip with its smoothing filter. Experimental results show the circuit to meet accepted requirements.
Keywords :
Active filters; Analogue-digital conversion; Decoding; Digital-analogue conversion; Electronic switching systems; Encoding; Field effect integrated circuits; Large scale integration; Pulse-code modulation; Telephone switching equipment; active filters; analogue-digital conversion; decoding; digital-analogue conversion; electronic switching systems; encoding; field effect integrated circuits; large scale integration; pulse-code modulation; telephone switching equipment; CMOS technology; Capacitors; Circuits; Codecs; Decoding; Filters; Operational amplifiers; Phase change materials; Power amplifiers; Pulse modulation;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1979.1051304
