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:
Feb. 23, 2021

Filed:

May. 16, 2019
Applicant:

Murata Manufacturing Co., Ltd., Nagaokakyo, JP;

Inventors:

Masanori Kato, Nagaokakyo, JP;

Minoru Iwanaga, Nagaokakyo, JP;

Hiroshi Matsubara, Nagaokakyo, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/72 (2006.01); H03H 7/46 (2006.01); H03H 7/01 (2006.01); H03H 9/00 (2006.01); H03H 9/70 (2006.01); H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
H03H 9/54 (2013.01); H03H 7/0161 (2013.01); H03H 7/463 (2013.01); H03H 9/0004 (2013.01); H03H 9/542 (2013.01); H03H 9/64 (2013.01); H03H 9/706 (2013.01); H03H 9/725 (2013.01);
Abstract

A filter includes a resonant circuit defining at least a portion of a signal path connected between a first terminal and a second terminal, an elastic wave resonator including one end that is grounded, a first inductor including one end connected to one end of the resonant circuit and another end connected to another end of the elastic wave resonator, and a second inductor including one end connected to another end of the resonant circuit and another end connected to the other end of the elastic wave resonator. The resonant circuit is an LC series resonant circuit in which a third inductor and first and second capacitors are connected in series with each other.


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