Pseudo-differential second-order band-reject filter using current conveyors

A voltage-mode high input impedance differential input-differential output second-order band-reject filter based on two differential difference current conveyors (DDCCs) and one second-generation current conveyor (CCII) is presented. The proposed structure features high input impedance, a minimum number of passive elements – all being grounded, high common-mode rejection ratio, and low sensitivity. The tracking error and sensitivity analysis of the proposed circuit are given. The performance of the filter structure is verified by simulations and also experimentally measured using the UCC-N1B integrated circuit.