Two-Channel Active RC-Filter with a Differential Input for Processing Signals of a Piezoelectric Transducer

New modifications of the active RC-filter with a differential input and a differential output, which provide high signal attenuation outside the band-pass range (38-496 Hz) and designed to process the signals of piezoelectric sensors, are presented. The basic equations of the developed circuit are given and their simulation is performed in the Micro-Cap application package on OP27 and AD8132 models of the operational amplifiers.