A high input impedance voltage-mode all-pass/notch filter using a single variable gain current conveyor

Abstract

In this paper, a novel circuit for realizing voltage-mode first-order and second-order all-pass filter responses as well as second-order notch filter response depending on the passive component choice, is presented. This circuit has high input impedance; thus, it is easy to cascade the introduced filter with other voltage-mode topologies. Also, it uses a single Variable Gain Current Conveyer VGCCII and only grounded capacitors. SPICE simulation results based on 0.35 µm TSMC CMOS technology parameters are given to confirm the theory. © 2008 World Scientific Publishing Company.