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Title:
PIEZOELECTRIC ELEMENT DRIVING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/195701
Kind Code:
A1
Abstract:
This piezoelectric element driving circuit is provided with: a piezoelectric element that is driven at a prescribed frequency and that has a resonance frequency (2n+1) times higher than the prescribed frequency (n is a prescribed natural number); and a driving voltage generation unit that has a first output terminal connected to a first terminal of the piezoelectric element and a second output terminal connected to a second terminal of the piezoelectric element. When the piezoelectric element is driven, the waveform of the potential difference between the first output terminal and the second output terminal exhibits a step wave which shifts through an intermediate potential. The length of time when the potential difference exhibits the intermediate potential is around (t2-t1)/(2n+1) in a period from a time t1 when the potential difference falls to the intermediate potential to a time t2 when the potential difference subsequently falls to the intermediate potential.

Inventors:
OKAGUCHI KENJIRO (JP)
Application Number:
PCT/JP2017/017236
Publication Date:
November 16, 2017
Filing Date:
May 02, 2017
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02N2/06; H01L41/04; H01L41/09
Domestic Patent References:
WO2013084709A12013-06-13
WO2015079736A12015-06-04
Foreign References:
JPS58198173A1983-11-18
JPH01158810A1989-06-21
JP2000184759A2000-06-30
JP2011199102A2011-10-06
JP4744636B12011-08-10
JP2003189644A2003-07-04
JP2003164172A2003-06-06
JP2013121308A2013-06-17
JPS55144297A1980-11-11
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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