Title :
A real-time programmable switched-capacitor filter
Author :
Cox, D.B. ; Lin, L.T. ; Florek, R.S.
Abstract :
Four independent real-time programmable switched-capacitor filters have been fabricated on a single NMOS chip. The filters are second-order sections with digitally programmable Q and center frequency. Either low-pass or bandpass functions are available by selecting the appropriate input. The device is microprocessor compatible and includes permanent programming capability as well as an on-chip oscillator. The circuit implementation, programming capability, and operation are described.
Keywords :
Active filters; Band-pass filters; Field effect integrated circuits; Low-pass filters; Switched capacitor networks; Switched filters; active filters; band-pass filters; field effect integrated circuits; low-pass filters; switched capacitor networks; switched filters; Adaptive filters; Capacitors; Circuits; Frequency; Logic devices; Logic programming; MOS devices; Oscillators; Speech analysis; Synthesizers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1980.1051506
