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.

Date of Patent:
Oct. 25, 2016

Filed:

Mar. 09, 2015
Applicant:

Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;

Inventor:

Soichi Nakamura, Nagaokakyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 7/46 (2006.01); H03H 7/01 (2006.01); H03H 7/42 (2006.01); H03H 9/00 (2006.01); H03H 9/70 (2006.01); H03H 7/12 (2006.01);
U.S. Cl.
CPC ...
H03H 7/0115 (2013.01); H03H 7/12 (2013.01); H03H 7/42 (2013.01); H03H 7/463 (2013.01); H03H 9/0023 (2013.01); H03H 9/70 (2013.01); H03H 7/1758 (2013.01);
Abstract

A filter device includes a single terminal and first and second balanced terminals. A balanced filter is connected between the single terminal and the first and second balanced terminals. The filter device includes a compensation circuit including at least one of a first compensation circuit portion connected between the single terminal and the first balanced terminal and a second compensation circuit portion connected between the single terminal and the second balanced terminal. The compensation circuit includes a resonant circuit that increases attenuation in a specified frequency band within a stop band of the balanced filter, compared with a case in which the compensation circuit is not connected.


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