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:
Aug. 03, 2004
Filed:
Jan. 23, 2002
Applicant:
Inventor:
Hiroki Watanabe, Ishikawa-ken, JP;
Assignee:
Murata Manufacturing Co., LTD, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/05 ;
U.S. Cl.
CPC ...
H03H 9/05 ;
Abstract
In a surface acoustic wave (SAW) apparatus, a substrate having a SAW device provided with a balun function mounted thereon is provided on a multi-layered bottom portion of a package. Electrical wiring patterns are disposed between an upper layer and a lower layer of the bottom portion such that a delay line, a reactance component, or a resistance component is added to at least one of the balanced signal terminals. Balanced signal external terminals to connect the SAW device to an external device are disposed symmetrically with respect to the center of the package.