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:
Feb. 07, 2006
Filed:
Dec. 16, 2003
Applicant:
Norio Taniguchi, Shiga-ken, JP;
Inventor:
Norio Taniguchi, Shiga-ken, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/70 (2006.01); H03H 9/72 (2006.01); H03H 9/54 (2006.01); H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ladder filter includes series arm resonators and parallel arm resonators which are alternately connected to each other. The series arm resonators include a first series arm resonator connected in parallel with an inductor and a second series arm resonator not connected to the inductor. The ladder filter satisfies the relationship of fsr<fsrwhere fsrrepresents the resonant frequency of the first series arm resonator and fsrrepresents the resonant frequency of the second series arm resonator.