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. 15, 2002
Filed:
Mar. 04, 1999
Applicant:
Inventor:
Osamu Furukawa, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/26 ;
U.S. Cl.
CPC ...
H04B 1/26 ;
Abstract
A surface acoustic wave device with an electrode structure that suppresses the deterioration of a withstand voltage against an overvoltage such as a surge voltage or noise applied to a balanced signal terminal is provided. A serial resonator that blocks a voltage is disposed among IDTs and a signal output terminal of the surface acoustic wave device. In addition, a serial resonator is disposed among the IDTs and a signal output terminal The serial resonators and operate as part of IDTs to extract a desired band signal. The structure of the serial resonator should be almost the same as that of the serial resonator