STUDY AND IMPLEMENTATION OF CURRENT CONVEYOR BASED WAVE ACTIVE FILTER

Abstract

In IC technology during the last some decade, designers used current mode technique to solve the several circuit design problem. The current-mode approach to signal processing has often been claimed to provide one or more of the following advantages: higher frequency range of operation, lower power consumption, higher slew rates, improved linearity, and better accuracy. In this thesis current mode building block namely current conveyor and its application as higher order current mode filter has been studied. The higher order filter is realized using wave equivalent method. A detailed discussion of wave equivalent of series inductor has been given. This is also realized using current conveyor. This technique offers design simplicity and modularity as the equivalents of the other reactive elements in the series or shunt branch can be readily obtained by interchanging the outputs of the elementary block and/or using current inverters. A third-order lowpass filters has been realized using current conveyor based wave equivalents and its performance is evaluated through PSPICE simulations using 0.18 micron TSMC CMOS technology parameters.