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:
Dec. 02, 2008
Filed:
Apr. 24, 2002
Olaf Wunnicke, Eindhoven, DE;
Hans P. Loebl, Monschau-Imgenbroich, DE;
Mareike K. Klee, Straelen, DE;
Robert F. Milsom, Redhill, GB;
Olaf Wunnicke, Eindhoven, DE;
Hans P. Loebl, Monschau-Imgenbroich, DE;
Mareike K. Klee, Straelen, DE;
Robert F. Milsom, Redhill, GB;
NXP B.V., Eindhoven, NL;
Abstract
The invention relates to an arrangement with two piezoelectric layers () and to a method of operating the arrangement as a filter. One () of the two piezoelectric layers () in the arrangement is situated between an electrode () and a middle electrode (), and the other one () of the two piezoelectric layers () is positioned between another electrode () and said middle electrode () such that a bulk acoustic wave resonator is formed. The one and the other electrode () and the middle electrode () are connected to circuitry means for applying high-frequency signals to at least one of the two piezoelectric layers () such that the bulk acoustic wave resonator has at least one resonance frequency when the circuitry means are in one switching state, and that the bulk acoustic wave resonator has at least one other resonance frequency different from the at least one resonance frequency when the circuitry means are in another switching state.