PIEZOELECTRIC TRANSDUCER WITH INTEGRAL DRIVER AND SENSOR

摘要

PIEZOELECTRIC TRANSDUCER WITH INTEGRAL DRIVER AND SENSORABSTRACTA transducer is shown wherein a piezoelectriccrystal is mounted within a housing upon a thin, flexiblemembrane. The crystal is coated with a metallic materialwhich permits a potential to be placed across the crystalsfor displacing the membrane to produce useful motion. Themetalic coating is interrupted to form a first and secondelectrode. The crystal thus is driven by a drive circuitconnected to the first electrode while a sensor circuitconnected to the second electrode generates a sensor signaluseful to determine the position of the crystal.