Electronically tunable voltage-mode multifunction biquad filter using single CCTA

A configuration based on single current conveyor trans-conductance amplifier (CCTA), three resistors, and two grounded capacitors is presented for the simultaneous realization of second order voltage-mode low pass (LP), band pass (BP), band reject (BR) and all-pass (AP) filtering functions using single voltage input signal. The circuit is canonical by way of using only two capacitors and possesses low active and passive sensitivity. Moreover, both ω₀ and Q can be electronically controlled by the bias currents of the CCTA. PSPICE simulation results using CMOS implementation of CCTA are shown for the testability of the proposed circuit.