SIGNAL DETECTOR

摘要

A small-size inexpensive signal detector used for easily detecting noise as a development tool for device developing engineers. 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. The high-frequency signal included the power supply voltage between a power supply output terminal (T2) and the signal separating filter (23) is outputted from signal output terminals (T3 to T5). The high-frequency signal from the power supply can be blocked by the signal suppressing filter (22) and the signal separating filter (23), and the influence of power supply noise on a measurement system can be eliminated. The signal separating filter (23) disposed between the signal suppressing filter (22) and the power supply output terminal (T2) blocks the absorption of the high-frequency signal generated in a device (3) being measured by the signal suppressing filter (22). Consequently, the lowering of the signal detection level at the signal output terminals (T3 to T5) can be prevented.