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:
Jan. 24, 2012
Filed:
Nov. 30, 2009
Seiichi Takahara, Ishikawa-ken, JP;
Seiichi Takahara, Ishikawa-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
An acoustic wave filter device having a greatly reduced size includes a balance-unbalance conversion function and an input/output impedance ratio of about 1. The acoustic wave filter device includes a second IDT of a first acoustic wave filter portion that is connected to an unbalanced terminal. The second IDT includes first and second divided IDT portions which are divided in an overlap width direction and connected in series with each other between the unbalanced terminal and a ground potential. A fifth IDT of a second acoustic wave filter portion connected to the first acoustic wave filter portion includes first and second divided IDT portions which are divided in an acoustic wave propagating direction. The first and second divided IDT portions of the fifth IDT are connected to first and second balanced terminals, respectively.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile