Universal current-mode active-C filters employing only plus-type current controlled conveyors

In this paper, two new universal current-mode cascadable active-C filters simultaneously realizing low-pass, band-pass and high-pass responses are proposed. One of the filters can also realize notch and all-pass responses with interconnection of the relevant output currents. The presented filters employ only four plus-type second-generation current controlled conveyors (CCCII+s) as active elements and only two capacitors as passive elements. The proposed active-C filters can be tuned electronically, and have low active and passive element sensitivities.