Title:
SIGNAL DETECTOR
Document Type and Number:
WIPO Patent Application WO2005072071
Kind Code:
A3
Abstract:
A signal detector having an excellent measurement function enabling simple and accurate cause analysis of noise occurrence. To power supply lines (21A, 21B) connected to power supply input terminals (T1), a signal suppressing filter (22) for suppressing a high-frequency signal included in the power supply voltage and a signal separating filter (23) for blocking transmission of the high-frequency signal are connected in series. A common-mode signal detecting circuit (25) and a normal-mode signal detecting circuit (26) are provided independently of each other. While bidirectionally blocking transmission of a high-frequency signal (noise) between the power supply and the device being measured by means of the signal suppressing filter (22) and the signal separating filter (23), the common-mode signal and the normal-mode signal generated in the device (3) and entering through a power supply output terminal (T2) are detecting separately. The analysis of the cause of occurrence of a high-frequency signal produced in the device (3) is facilitated, and proper noise measure man be taken.
Inventors:
SAITOH YOSHIHIRO (JP)
WASAKI MASARU DI
WASAKI MASARU DI
Application Number:
PCT/JP2005/000968
Publication Date:
October 06, 2005
Filing Date:
January 26, 2005
Export Citation:
Assignee:
TDK CORP (JP)
WASAKI HITOMI HF (JP)
SAITOH YOSHIHIRO (JP)
WASAKI HITOMI HF (JP)
SAITOH YOSHIHIRO (JP)
International Classes:
G01R31/00; G01R29/26; (IPC1-7): G01R29/26
Foreign References:
| JP2000314756A | 2000-11-14 | |||
| JP2002231813A | 2002-08-16 | |||
| JPS6064269U | 1985-05-07 |
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