Piezo actuator driving circuit

Details Piezo actuator driving circuit Piezo actuator driving circuit

2007-09-18

2007-09-18

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S315000, C310S317000

Reexamination Certificate

active

11435745

ABSTRACT:
The present invention relates to a piezo actuator driving circuit. The piezo actuator driving circuit includes a pulse generator that generates a first voltage pulse with a constant period; a first driver stage that receives the first voltage pulse of the pulse generator and buffers the first voltage pulse to output; a second driver stage that converts the first voltage pulse, buffered and output in the first driver stage, into a first current pulse to output; a driving voltage maintaining section that is connected to the pulse generator and the second driver stage so as to output a second current pulse for maintaining a constant amplitude of driving voltage pulse; and a piezo actuator that is connected to the second driver stage and the driving voltage maintaining section so as to be charged and discharged by the first and second current pulses and that is driven by the driving voltage pulse with a constant amplitude.

REFERENCES:
patent: 6781472 (2004-08-01), Watanabe
patent: 2006/0001329 (2006-01-01), Rao et al.
patent: 2003-37984 (2003-02-01), None
patent: 2005-237144 (2005-09-01), None
patent: 100172358 (1998-10-01), None
patent: 2002-0087269 (2002-11-01), None

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