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:
Oct. 05, 2004
Filed:
Jul. 18, 2002
Takashige Terakawa, Kanagawa, JP;
Hideyuki Yamanaka, Tokyo, JP;
EMC Inc., Tokyo, JP;
Abstract
A noise filter of the present invention includes an inductor and a resistor connected in parallel with each other. A power supply frequency current bypasses the resistor but passes through the inductor . A high frequency noise current including a resonance frequency current, on the other hand, bypasses the inductor but is dissipated at the resistor . Therefore, the noise filter does not accumulate noise power and so does not suffer from a problem due to power releasing. The resonance frequency current caused by combination of inductance of the inductance and earth capacitance in the noise filter is also dissipated at the resistor , thus giving rise to no problem of its own.