| 摘要 |
PROBLEM TO BE SOLVED: To provide a current-voltage amplifier circuit capable of measuring current being a range or more and weak current by amplifying voltage to the range of the semiconductor testing apparatus or more and applying the voltage. SOLUTION: The current-voltage amplifier circuit is provided with: a current amplifier circuit 201 which is provided with an amplifier Q1 in which an input signal is input to its noninverted input terminal, a resistor R1 connected between the noninverted input terminal of the amplifier Q1 and the output terminal, and a resistor R2 connected between the output terminal of the amplifier Q1 and the noninverted input terminal, wherein an output signal line for transmitting a signal to a DUT is connected between the resistor R2 and the noninverted input terminal of the amplifier Q1; and a voltage ratio setting circuit 301 which is provided with an amplifier Q2 in which a noninverted input terminal is connected to an output signal line, and the noninverted input terminal and an output terminal are shirt-circuited, a resistor R3 whose both ends are connected to the noninverted input terminal of the amplifier Q1 and ground, and a resistor R4 whose both ends are connected to the noninverted input terminal of the amplifier Q1 and the output terminal of the amplifier Q2. COPYRIGHT: (C)2008,JPO&INPIT
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