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:
Oct. 02, 2018
Filed:
May. 27, 2016
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Inventor:
Norihiko Nakahashi, Nagaokakyo, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/64 (2006.01); H03H 9/56 (2006.01); H03H 9/60 (2006.01); H03H 9/00 (2006.01);
U.S. Cl.
CPC ...
H03H 9/542 (2013.01); H03H 9/0009 (2013.01); H03H 9/568 (2013.01); H03H 9/605 (2013.01); H03H 9/64 (2013.01); H03H 9/6483 (2013.01);
Abstract
A filter apparatus includes a plurality of stages of ladder circuits connected between an input terminal and an output terminal, and a band width ratio is about 4.3 % or higher. The ladder circuits of respective stages include series arm resonators, parallel arm resonators, first inductors respectively connected between a ground potential and first end portions, and second inductors respectively connected between the ground potential and second end portions.