Drive circuit for piezo ceramic device
OwnerPaul Weaver, Simon Powellinventors
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Abstract
A control circuit for controlling the operation of a piezo ceramic actuator comprising means for applying a voltage to the piezo ceramic actuator, the means arranged such that a linear charge is applied to the piezo ceramic device (10) which in turn produces a linear displacement of the piezo ceramic device. The control circuit preferably comprises four transistor switches (20) in H-bridge configuration.
Claims15
A control circuit for controlling the operation of a piezo ceramic actuator comprising means for applying a voltage to the piezo ceramic actuator, the voltage applying means being arranged such that a charge is applied to the piezo ceramic device which in turn produces a displacement of the piezo ceramic device, characterised in that the voltage applying means is arranged to apply a reverse bias voltage to the actuator.
Dependencies are inferred from the claim text.