Current-mode Multifunctional Filter Based on MO-OTAS and CCCII

A novel structure of biquadrates filter based on multiple current output operational transconductance amplifier(MO-OTA) and current controlled conveyor(CCCII) is presented in this paper.The proposed circuit is constructed with one CCCII,two MO-OTAS and three grounded capacitors.Various filtering functions such as slow-pass,high-pass,band-pass,notch,all-pass filtering are obtained by selecting different output signal combinations.Range of the central frequency of the proposed circuit is very large,and separately adjustable centre frequency ω0 and the quality factor Q.Theoretical analysis and PSpice simulation indicate that the proposed circuit is effective and feasible.