Design of universal current-mode filter employing CCCII+s

Abstract

In this paper, a universal current-mode filter for simultaneously providing all the general responses such as low-pass, band-pass, high-pass, notch and all-pass responses, is proposed. The proposed biquad employs only two grounded capacitors and three identical plus-type current-controlled conveyors (CCCII+s) thus it can easily be realized in integrated circuit (IC) process. Nevertheless, it requires a resistive component matching condition for all-pass response. Also, signal limitation and stability problems in analog filters are discussed. Finally, simulation results with SPICE program are given to confirm the theory.