| 摘要 |
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 ).
|
