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:
Dec. 01, 2015
Filed:
Nov. 26, 2013
Tdk Corporation, Tokyo, JP;
Takeshi Okumura, Tokyo, JP;
Tomonaga Nishikawa, Tokyo, JP;
Takashi Nakagawa, Tokyo, JP;
Toshio Tomonari, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A common mode filter is provided with first and second spiral patterns provided on an insulating layer and connected to each other in series, and third and fourth spiral patterns provided on an insulating layer and connected to each other in series. The first and third spiral patterns overlap each other so as to be magnetically coupled with each other. The second and fourth spiral patterns overlap each other so as to be magnetically coupled with each other. Relationships between winding directions of the first and second spiral patterns and between winding directions of the third and fourth spiral patterns are set to cancel out magnetic fluxes of the couples of the spiral patterns each other, respectively. Each number of turns in the first and third spiral patterns is larger than each number of turns in the second and fourth spiral patterns respectively.