A Filter with Three Voltage-inputs and One Voltage-output and One Current-output Using Current Conveyors

A new biquadratic filter with three voltage-inputs and one voltage-output and one current-output is presented. The filter employs two types of current conveyors, grounded resistors and grounded capacitors to realize the lowpass, highpass and bandpass responses by selecting different input signals. The proposed circuit has high input impedance, independent adjustments of angular frequency ω0 and quality factor Q using capacitors and resistors, in addition to low active and passive sensitivities. Hspice simulation results are given to demonstrate the new proposed biquadratic filter.