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Shahram Minaei,Sait Türköz 한국전자통신연구원 2004 ETRI Journal Vol.26 No.4
In this paper we present a new current-mode electronically tunable universal filter using only plus-type current controlled conveyors (CCCII+s) and grounded capacitors. The proposed circuit can simultaneously realize lowpass, bandpass, and highpass filter functions— all at high impedance outputs. The realization of a notch response does not require additional active elements. The circuit enjoys an independent current control of parameters ωo and ωo / Q. No element matching conditions are imposed. Both its active and passive sensitivities are low.