| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-size and inexpensive signal detector simply used for noise detection as a development tool for device development engineers. SOLUTION: On power source lines 21A and 21B connected to a power source input terminal T1, a signal suppression filter 22 for suppressing high-frequency signals included in a power source voltage and a signal separation filter 23 for hindering the transmission of the high-frequency signal are provided in series while a high-frequency signal included in the source voltage is outputted from signal output terminals T3 to T5, the source voltage being across a power source output terminal T2 and the separation filter 23. The high-frequency signal from a power source can be blocked by the suppression filter 22 and by the separation filter 23, making it possible to remove the effect of power source noise on a measurement system. Since the separation filter 23, positioned between the suppression filter 22 and the output terminal T2, hinders a high-frequency signal occurring in an apparatus 3 under measurement from being absorbed by the suppression filter 22, a signal detection level at the output terminals T3 to T5 can be prevented from lowering. COPYRIGHT: (C)2005,JPO&NCIPI
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