Current-mode universal biquadratic filter with five inputs and one output using three ICCIIs

A current-mode universal biquadratic filter with five inputs and one output employing three inverting second-generation current conveyors (ICCIIs), two grounded capacitors and two resistors is presented. The new circuit offers the following advantage features: very low active and passive sensitivities, using of grounded capacitors that is ideal for integrated circuit implementation, the versatility to synthesize any type of active filter transfer functions without requirements for critical component matching conditions, very high output impedance and needs not another current follower to duplicate the input current signal for the realization of notch or allpass responses.