Title :
CMOS switched-capacitor filters for a PCM voice CODEC
Author :
Gregorian, Roubik ; Nicholson, William E., Jr.
fDate :
12/1/1979 12:00:00 AM
Abstract :
Three switched-capacitor circuits are described which perform all filtering functions in a PCM voice CODEC. They use novel integrators and/or state-variable sections, which desensitize the overall response against stray-capacitance effects. All filters are fully integrated on a CMOS test chip. The basic design considerations and the measured performance are discussed.
Keywords :
Active filters; Decoding; Electronic switching systems; Encoding; Field effect integrated circuits; Pulse-code modulation; Switched filters; Telephone switching equipment; active filters; decoding; electronic switching systems; encoding; field effect integrated circuits; pulse-code modulation; switched filters; telephone switching equipment; Clocks; Codecs; Frequency response; Low pass filters; Phase change materials; Pulse measurements; Sampling methods; Semiconductor device measurement; Switched capacitor circuits; Telephony;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1979.1051305
