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. 04, 2020
Filed:
Mar. 04, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Kazuhiro Tsukamoto, Tokyo, JP;
Hiroya Suzuki, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/54 (2006.01); H03H 9/64 (2006.01); H03H 9/70 (2006.01); H03H 9/72 (2006.01); H03H 7/01 (2006.01);
U.S. Cl.
CPC ...
H03H 9/542 (2013.01); H03H 7/1758 (2013.01); H03H 7/1766 (2013.01); H03H 7/1775 (2013.01); H03H 9/64 (2013.01); H03H 9/703 (2013.01); H03H 9/706 (2013.01); H03H 9/72 (2013.01); H03H 9/725 (2013.01);
Abstract
A branching filter includes a first band-pass filter provided between a common port and a first signal port, and a second band-pass filter provided between the common port and a second signal port. The first band-pass filter includes a first LC resonant circuit and a first resonant circuit section. The first resonant circuit section includes a first acoustic wave resonator. The second band-pass filter includes a second LC resonant circuit and a second resonant circuit section. The second resonant circuit section includes a second acoustic wave resonator and an inductor connected in parallel.