High input impedance DDCC-based voltage-mode universal biquadratic filter with three inputs and five outputs

A new versatile high input impedance voltage-mode universal biquadratic filter with three inputs and five outputs is presented. The proposed circuit uses three plus-type differential difference current conveyors (DDCCs), two grounded capacitors and two resistors. The circuit offers realizing all the standard filter functions, that is, highpass, bandpass, lowpass, notch, and allpass filters, simultaneously, without component matching conditions, using grounded capacitors, high input impedance and low active and passive sensitivities.