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:
May. 20, 2025
Filed:
Jan. 30, 2023
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Shuhei Sawaguchi, Tokyo, JP;
Masahiro Tatematsu, Tokyo, JP;
Yuta Ashida, Tokyo, JP;
Tetsuzo Goto, Tokyo, JP;
Yoshinori Matsumaru, Tokyo, JP;
Shigemitsu Tomaki, Tokyo, JP;
Longfei Yi, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 7/01 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01); H01F 27/40 (2006.01); H01G 4/01 (2006.01); H01G 4/30 (2006.01);
U.S. Cl.
CPC ...
H03H 7/0115 (2013.01); H01F 27/2804 (2013.01); H01F 27/29 (2013.01); H01F 27/40 (2013.01); H01G 4/01 (2013.01); H01G 4/30 (2013.01); H03H 7/0161 (2013.01); H01F 2027/2809 (2013.01);
Abstract
A filter circuit includes a pair of balanced input ports, a pair of balanced output ports, and first and second resonators provided in parallel between the pair of balanced input ports and the pair of balanced output ports in a circuit configuration, the first and second resonators being magnetically coupled to each other. Between the first resonator and the second resonator, a capacitor is present but no inductor is present in the circuit configuration.