Current-mode Multifunction Filter Based on Multi-output FTFN
Zeng Wen-hai · Keisou gijutsu · 2007
A current-mode multifunction biquardratic filter based on multi-output four terminal float nullor(FTFN) is proposed.The circuit is composed of three multi-output FTFNs and five passive components,it can be used to realize second order lowpass,highpass,bandpass,bandstop and allpass filtering functions.The RC elements are all grounded,being integrated conveniently.Orthogonal control with the natural angular frequencyω0 and the quality factor Q has very low passive sensitivity.