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:
Mar. 31, 2009
Filed:
Jul. 29, 2005
Soitsu Sasaki, Sabae, JP;
Tomohiro Sasaki, Fukui, JP;
Haruhiko Ueno, Sabae, JP;
Shigekatsu Yamamoto, Echizen, JP;
Soitsu Sasaki, Sabae, JP;
Tomohiro Sasaki, Fukui, JP;
Haruhiko Ueno, Sabae, JP;
Shigekatsu Yamamoto, Echizen, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A noise filter includes a plurality of LC parallel resonant circuits having a plurality of coils which are connected in series and electrically connected to external electrodes at both ends thereof, and capacitors which are connected in parallel to the coils, respectively, and are disposed inside an insulator while being sequentially connected in tandem to signal wires. Resonance frequencies of the respective LC parallel resonant circuits are preferably different from each other. Further, a shield electrode is disposed between the coils, and the shield electrode also defines a capacitance-forming electrode for preventing magnetic coupling between the two coils.