Title:
DRIVE DEVICE AND FLUID CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/151172
Kind Code:
A1
Abstract:
This drive device (10) is provided with a voltage regulating circuit (11), a drive signal generating circuit (12), a current limiting circuit (13), and a voltage control circuit (14). The voltage regulating circuit (11) regulates a power supply voltage and outputs a driving voltage. The drive signal generating unit (12) uses the driving voltage to generate a drive signal for a piezoelectric element of a piezoelectric pump (20). The current limiting circuit (13) limits a driving current corresponding to the driving voltage to a predetermined current or less, and generates a current control voltage. The voltage control circuit (14) limits the driving voltage on the basis of the current control voltage.
Inventors:
OKAGUCHI KENJIRO (JP)
Application Number:
PCT/JP2019/002664
Publication Date:
August 08, 2019
Filing Date:
January 28, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02N2/06; B06B1/06; F04B43/04; F04B45/047; H01L41/04; H01L41/09
Foreign References:
| JP2017131098A | 2017-07-27 | |||
| JP2007129804A | 2007-05-24 | |||
| JP2005210769A | 2005-08-04 | |||
| JP2004056914A | 2004-02-19 |
Other References:
See also references of EP 3694100A4
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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