Bidirectional front-end for piezoelectric resonator

Abstract

This paper presents a bidirectional circuit as front-end for piezoelectric ceramic resonators. The front-end both actives and reads the response of the resonator in different directions and the directionality of the front-end is controlled by swapping the supply rails. Experimental results are obtained by measuring on a semi-discrete board prototype. The resonant frequency of the sensor is 110kHz, the bandwidth of the bidirectional front-end is 1kHz - 500kHz which was implemented by using a CD4007UBE IC. Results show that the system provides an easy and effective way to send an activation signal and to read the response of a piezoelectric resonator.