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:
Jul. 29, 2008
Filed:
Jan. 26, 2005
Hitomi Wasaki, Legal Representative, Ichihara, JP;
Yoshihiro Saitoh, Tokyo, JP;
Hitomi Wasaki, legal representative, Ichihara, JP;
Yoshihiro Saitoh, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A signal suppression filter () that inhibits high-frequency signals contained in power voltage and a signal separation filter () that prevents transmission of the high-frequency signals are provided in series on power lines (A), (B) connected to a power input terminal (T), and a common-mode signal detection circuit () and a normal-mode signal detection circuit () are provided separately from each other. While bi-directionally blocking transmission of a high-frequency signal (noise) between the power supply and the device to be measured by the signal suppression filter () and the signal separation filter (), the common mode signal and the normal mode signal generated in the device to be measured () and entering through a power output terminal (T) are detecting separately. The analysis of the cause of occurrence of a high-frequency signal produced in the device to be measured () is facilitated, and proper noise countermeasure may be taken.