Title: Frequency-control-type piezo actuator driving circuit and method of driving the same
Application Number: 200610083170 Application Date: 2006.06.07
Publication Number: 1913323 Publication Date: 2007.02.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02N2/00
Applicant(s) Name: Samsung Electro Mech Address:
Inventor(s) Name: Ha Chang W.;Gong Jung C.;Shin Sang C.;Min Byoung O
Attorney & Agent: li wei
Abstract:
    The present invention relates to a frequency-control-type piezo actuator driving circuit. The frequency-control-type piezo actuator driving circuit includes a piezo actuator that is driven by a constant amplitude of driving voltage pulse; a piezo driver that is connected to the piezo actuator so as to drive the piezo actuator; a frequency controller that is connected to the piezo driver so as to measure currents consumed when the piezo driver drives the piezo actuator, to detect a frequency corresponding to the maximum current among the measured currents, and to generate a frequency control signal corresponding to the detected frequency; and a frequency synthesizer that fixes a frequency of the piezo actuator in accordance with the frequency control signal of the frequency controller and generates the fixed frequency to the piezo driver.
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