The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2022
Filed:
Sep. 13, 2017
Usound Gmbh, Graz, AT;
Ferruccio Bottoni, Graz, AT;
Markus Haensler, Graz, AT;
Andrea Rusconi Clerici Beltrami, Vienna, AT;
USound GmbH, Graz, AT;
Abstract
A method is provided for operating a piezoelectric MEMS sound transducer in the audible wavelength spectrum and/or in the ultrasonic range. The method includes storing electrical energy in an energy store and indirectly transferring this electrical energy via a transfer unit between the energy store and the piezoelectric MEMS sound transducer. In a first switching state, the transfer unit is first of all charged from the energy store. In a second switching state, the transfer unit is discharged and the piezoelectric MEMS sound transducer is charged. In a third switching state, the piezoelectric MEMS sound transducer is discharged and the transfer unit is charged. In a fourth switching state, the transfer unit is then discharged and the energy store is charged.