Tech Guide - Technical Bulletins

Self-Drive Transducer Circuits

Self Drive Transducers have three terminals. The third terminal supplies a feed-back voltage that is 180° out of phase with the drive signal. Below are two circuits that can be used with these types of transducers.

It should be noted that these circuits are only initial suggestions. Values of the resistors may need to be adjusted depending on the particular transducer model used. Square- wave type signals result in more sound level than sine-wave type signals.

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