Title:
信号検出装置
Document Type and Number:
Japanese Patent JP4561962
Kind Code:
B2
Abstract:
A signal suppression filter ( 22 ) that inhibits high-frequency signals contained in power voltage and a signal separation filter ( 23 ) that prevents transmission of the high-frequency signals are provided in series on power lines ( 21 A), ( 21 B) connected to a power input terminal (T 1 ), and a common-mode signal detection circuit ( 25 ) and a normal-mode signal detection circuit ( 26 ) 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 ( 22 ) and the signal separation filter ( 23 ), the common mode signal and the normal mode signal generated in the device to be measured ( 3 ) and entering through a power output terminal (T 2 ) are detecting separately. The analysis of the cause of occurrence of a high-frequency signal produced in the device to be measured ( 3 ) is facilitated, and proper noise countermeasure may be taken.
Inventors:
Ken Wasaki
Yoshihiro Saito
Yoshihiro Saito
Application Number:
JP2004024869A
Publication Date:
October 13, 2010
Filing Date:
January 30, 2004
Export Citation:
Assignee:
tdk Corporation
International Classes:
G01R29/26; G01R31/00
Domestic Patent References:
| JP6062831A | ||||
| JP2002290289A | ||||
| JP2002204189A | ||||
| JP2002290292A | ||||
| JP6064269U | ||||
| JP5300235A | ||||
| JP5336112A |
Attorney, Agent or Firm:
Yasushi Santanzaki
Yoichiro Fujishima
Yoichiro Fujishima