Title :
A digitally programmable switched-capacitor universal active filter/oscillator
Abstract :
A universal second-order switched-capacitor filter section has been fabricated on an NMOS chip. The device can perform all five basic filter types as well as a sine wave oscillator without external components, while requiring only an external clock. The filter type is determined by selecting one or more of three input pins. The filter response is determined by ten external programming pins which may be either digitally controlled or hard wired.
Keywords :
Active filters; Field effect integrated circuits; Linear integrated circuits; Oscillators; Switched capacitor networks; Switched filters; active filters; field effect integrated circuits; linear integrated circuits; oscillators; switched capacitor networks; switched filters; Active filters; Band pass filters; Clocks; Digital filters; Frequency; Low pass filters; Oscillators; Pins; Switching circuits; Telecommunication switching;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1983.1051960
