Transducers with piezoelements in circuits of electric filters

Abstract

Transducers with piezoelements in electric filters are developed and investigated. Inclusion of piezoelements in to circuits of filters has allowed to obtain amplitude-frequency responses (АFR), corresponding to these filters, and thus to expand their frequency range. However, the drawback of the mentioned transducers is necessity of use for some schemes of two piezoelements or a piezoelement and the condenser. For elimination of this shortcoming it is proposed to use in circuits of piezotransformers also. Besides, for one or for two systems it is offered to put electrodes so that the electric field vector between these electrodes would be at the angle α to a polarisation vector. It allows to get electric voltage which exceeds the voltage for a conventional case when α =0 on these electrodes. Eight schemes of such transducers are developed. Computer models with which help it is possible to predict АFR of the transducers with piezoelements and piezotransformers in schemes of electric filters are developed.