Title:
信号検出装置
Document Type and Number:
Japanese Patent JP4561961
Kind Code:
B2
Abstract:
A small and inexpensive signal detector is provided, which can be simply used for noise detection as a development tool for development engineers of systems and devices. A signal suppression filter ( 22 ) of inhibiting high-frequency signals contained in power voltage and a signal separation filter ( 23 ) of inhibiting transmission of the high-frequency signals are provided in series in power lines ( 21 A), ( 21 B) connected to a power input terminal (T 1 ), and high-frequency signals contained in power voltage between a power output terminal (T 2 ) and the signal separation filter ( 23 ) are outputted from signal output terminals (T 3 ) to (T 5 ). High-frequency signals from a power source can be blocked by the signal suppression filter ( 22 ) and the signal separation filter ( 23 ), so that influence of power noise on a measurement system can be eliminated. Since the signal separation filter ( 23 ) situated between the signal suppression filter ( 22 ) and the power output terminal (T 2 ) inhibits high-frequency signals generated in a device to be measured ( 3 ) from being absorbed by the signal suppression filter ( 22 ), a signal detection level can be prevented from being reduced at the signal output terminals (T 3 ) to (T 5 ).
Inventors:
Ken Wasaki
Yoshihiro Saito
Yoshihiro Saito
Application Number:
JP2004024864A
Publication Date:
October 13, 2010
Filing Date:
January 30, 2004
Export Citation:
Assignee:
tdk Corporation
International Classes:
G01R29/26; H03H1/00; H03H7/09
Domestic Patent References:
| JP6062831A | ||||
| JP2002290289A | ||||
| JP2000323951A | ||||
| JP2003218754A | ||||
| JP200388099A | ||||
| JP10200358A | ||||
| JP2003188778A | ||||
| JP59115358U |
Attorney, Agent or Firm:
Yasushi Santanzaki
Yoichiro Fujishima
Yoichiro Fujishima