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Patent Searching and Data


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 (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2019/002664
Publication Date:
August 08, 2019
Filing Date:
January 28, 2019
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H02N2/06; B06B1/06; F04B43/04; F04B45/047; H01L41/04; H01L41/09
Foreign References:
JP2017131098A2017-07-27
JP2007129804A2007-05-24
JP2005210769A2005-08-04
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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