STUDY AND IMPLEMENTATION OF CURRENT CONVEYOR BASED FILTER REALIZATION AND COMPONENT REALIZATION

Abstract

Current conveyors are very important active building blocks used for analog signal processing. Current conveyors and their various derivatives are used for performing signal processing functions like amplification, filtering (both in voltage mode and current mode) and signal generation under different performance requirements. Different realization of current conveyors has been presented in the literature during past several decades. The second generation current conveyor is a three terminal active building block in which one of the input terminals has infinite input impedance whereas the other input terminal has zero input impedance. The output terminal has infinite output impedance (behaves as an ideal current source). The current conveyor can be used in both voltage mode as well as current mode circuits. Current conveyors have also been used in the realization of simulated immittances. Though the current conveyor is not available as a standard IC from major IC manufacturers many integrable realization of the current conveyor (both in bipolar and CMOS forms) are available in the open literature. In the present work a comparative study of different signal processing functions namely filter realizations and component simulations using different realizations of the second generation current conveyor has been presented.