| 摘要 |
PROBLEM TO BE SOLVED: To prevent a load, such as the semiconductor integrated circuit element, etc., from being broken by a discharged current, when the charges charged in a stray capacity flow to the load in the case where a voltage is impressed upon the load from a voltage impressing device, which impresses the voltage upon the load and measures the DC characteristics of the load by measuring the current, etc., flowing to the load. SOLUTION: A voltage-impressing device is constituted, in such a way that the device supplies a commercial power supply voltage to an AC/DC converter 22 and the converter 22 generates a desired DC voltage and supplies the voltage to a load 10 through first and second switches KL and KH, respectively connected to a common potential line LO and a hot potential line LH. In addition, a serial circuit of a resistor Rm and a third switch Km is connected in parallel with the first switch KL connected to the common potential line LO, and when the device impresses a voltage upon the load 10, the first switch KL and the second switch KH are successively controlled to turned-on states in this order.
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