DRIVE CIRCUITS AND METHODS FOR ULTRASONIC PIEZOELECTRIC ACTUATORS
A drive circuit for and method of driving a piezoelectric actuator utilizes an impedance coupled to the piezoelectric actuator, wherein the impedance and the piezoelectric actuator together form a tank circuit that has a resonant frequency. A first circuit is provided that drives the actuator at the...
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Main Authors | , , |
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Format | Patent |
Language | English French German |
Published |
15.04.2015
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Subjects | |
Online Access | Get full text |
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Summary: | A drive circuit for and method of driving a piezoelectric actuator utilizes an impedance coupled to the piezoelectric actuator, wherein the impedance and the piezoelectric actuator together form a tank circuit that has a resonant frequency. A first circuit is provided that drives the actuator at the resonant frequency and a second circuit is further provided that selectively operates the first circuit in one of at least two modes of operation including a first mode that causes the actuator to be energized at a first duty cycle and a second mode that causes the actuator to be energized at a second duty cycle. |
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Bibliography: | Application Number: EP20070811272 |