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:
Jun. 24, 2003
Filed:
Apr. 05, 2001
Mareike Katharine Klee, Hueckelhoven, DE;
Robert Frederick Milsom, Redhill, GB;
Hans Peter Löbl, Monschau-Imgenbroich, DE;
Rainer Kiewitt, Roetgen, DE;
Uwe Mackens, Aachen, DE;
Martinus Hermanus Wilhemus Maria Van Delden, Eindhoven, NL;
Wilhelm Georg Hermann, Roetgen, DE;
Olaf Wunnicke, Warburg, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention describes a tunable filter arrangement with a plurality of resonators which are coupled to one another and of which there is at least one which comprises a piezoelectric component made of a ferroelectric material and to which a DC voltage source is connected. The application of a DC voltage to the resonator renders it possible to change its electrical properties and thus the overall filter characteristic. Furthermore, a transmitter, a receiver device, and a mobile telephone device with such a filter arrangement are disclosed, aswell as a tunable bulk acoustic wave resonator.