Current mode allpass/notch and bandpass filters with reduced sensitivities

A current processing filter with two transfer functions (bandpass and notch/allpass) directly available is described. It uses a first generation current conveyor and six passive components. It is demonstrated that the choice of the passive component values leads to low passive and active sensitivities. The frequency f₀, and the quality factor, Q, can be chosen independently as regards the notch/allpass configuration. Simulation results made with SPICE confirm the theoretical analysis and are given and discussed.