Title :
A single-chip NMOS dual channel filter for PCM telephony applications
Author :
Gray, Paul R. ; Senderowicz, Daniel ; Ohara, Harlan ; Warren, Ben M.
Abstract :
The implementation of a completely monolithic channel filter containing all frequency selective functions associated with a PCM line interface is described. The circuit utilizes switched capacitor techniques. Design of the overall architecture, the individual filter sections, and the operational amplifiers in NMOS technology is described. Experimental results are presented.
Keywords :
Active filters; Electronic switching systems; Field effect integrated circuits; Pulse-code modulation; Switched filters; Telephone switching equipment; active filters; electronic switching systems; field effect integrated circuits; pulse-code modulation; switched filters; telephone switching equipment; Cost function; Frequency; Integrated circuit technology; Low pass filters; MOS devices; Operational amplifiers; Phase change materials; Pulse modulation; Signal sampling; Telephony;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1979.1051306
