DESIGN OF AGC CIRCUITS FOR OSCILLATOR USING CURRENT CONVEYOR BASED TRANSLINEAR LOOPS

Abstract

With the increasing demand of portable and battery driven devices a low voltage operating devices has become necessary and for this current mode techniques are ideally suited. This thesis is focused on current conveyor based translinear(TL) loops in which a novel topology for TL loops comprising of CMOS second Generation Current Conveyors (CC-II) and diodes is studied. Using the same a new circuit of an integrator is implemented using log-domain principle. Further, three circuits for automatic gain control are proposed and implemented. All the proposed circuits are verified for the functionality using PSPICE and 0.18μm TSMC CMOS technology parameters.