Title :
A high performance low power CMOS channel filter
Author :
Black, William C., Jr. ; Allstot, David J. ; Reed, Ray A.
Abstract :
A new CMOS PCM channel filter is described, which includes transmit and receive filters on a single die. This chip displays an idle-channel noise of typically 0 dBrnC0, a power supply rejection ratio of 40-50 dB at 1 kHz, and a fully operational power dissipation of only 35 mW, making it very cost effective in telecommunication switching systems. The design of this chip, including architectural, switched capacitor filter, and amplifier considerations is described, and typical experimental results are presented.
Keywords :
Active filters; Field effect integrated circuits; Pulse-code modulation; active filters; field effect integrated circuits; pulse-code modulation; Capacitors; Circuit noise; Codecs; Decoding; Phase change materials; Power dissipation; Power filters; Semiconductor device noise; Switching systems; Telecommunication switching;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1980.1051499
