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:
Jul. 17, 2012
Filed:
Nov. 09, 2009
Yasuaki Shin, Hakusan, JP;
Yasuaki Shin, Hakusan, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
An acoustic wave filter device includes a plurality of acoustic wave filters disposed on the same piezoelectric substrate, and achieves enlargement of out-of-passband attenuation without a large increase in its size. For at least the first acoustic wave filter, ends of second IDTs and of third IDTs connected to first and second balanced terminals, the ends being connected to a ground potential, are connected to a common connection line, the common connection line is connected to a ground terminal by a ground line, and a distance between a connection point, at which the ground line is connected to the common connection line, and the first balanced terminal, and a distance between the connection point and the second balanced terminal, is the same or substantially the same.