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:
Mar. 20, 2012
Filed:
Aug. 17, 2009
Andreas Bernardus Maria Jansman, Nuenen, NL;
Andreas Bernardus Maria Jansman, Nuenen, NL;
NXP B.V., Eindhoven, NL;
Abstract
A device has an electroacoustic interface between interfaces for balanced electrical signals and unbalanced electrical signals (i.e. a balun) includes a film of piezoelectric material having a first and second pair of electrodes on a first surface a common electrode, with at least partial overlaps with all of the electrodes of the first and second pair, on a second surface. The interfaces between the electrodes in the first and second pair have geometrically identical shapes. Piezoelectrically polarized regions are provided in the film at the overlaps of the electrodes with the electrode arrangement. The direction of polarization components of the regions in the overlaps with the first electrode and the second electrode in the first pair are equal to each other. To provide for balun coupling, the directions of the polarization components in the overlaps with the first electrode and the second electrode in the second pair are mutually opposite.