Aplikace syntetických imitančních prvků v aktivních filtrech

Abstract

Thesis solves problems of use of synthetic immittance elements in the circuits of frequency filters. Theoretical part of thesis presents primary informations of synthetic immittance elements. New modern elements – current conveyors, are discussed for more details. There is presented a brief history, a development and the basic functional properties of current conveyors here. Universal current conveyor is presented as a next. This new multifunctional type of current conveyor makes possible the realization of all previous generations and types of current conveyors. There are introduced another types of modern active circuits here that can be used for the realization of synthetic immittance elements. Theoretical part of thesis also discuss a primary theory of frequency filters and questions of active RC filters. Synthetic inductor is presented for more details because this synthetic element is important for practical realization. Practical use of all previous theoretical informations presents the practical part of thesis. Practical part of thesis is based on use of synthetic inductor in bandstop filter. This circuit is based on efective substitution of operational amplifier by circuit that use active elements CCII+.