ELECTRIC MEASUREMENT DEVICE INCLUDING INTEGRATION TYPE CURRENT/VOLTAGE CONVERSION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To exclude a measurement error caused by a dielectric absorption phenomenon inherent in a capacitor for integration in an electric measurement device including an integration type current/voltage conversion circuit.;SOLUTION: The electric measurement device includes an integration type current/voltage conversion circuit 20 including a capacitor 22 for integration in a feedback circuit connected between one input terminal 21a and an output terminal 21c of an operational amplifier 21, and a DC voltage source 10. The electric measurement device is configured so that a resistor Rx to be measured is connected between the DC voltage source 10 and the one input terminal 21a of the operational amplifier 21, and a predetermined element characteristic included in the resistor Rx to be measured is measured based on an output voltage Vo appearing on the output terminal 21c of the operational amplifier 21 in accordance with electric charge to be charged to the capacitor 22. The electric measurement device further includes a DC current source 40 for reverse charge which after measuring the element characteristic of the resistor Rx to be measured by applying a predetermined voltage to the resistor Rx to be measured by the DC voltage source 10, charges the capacitor 22 for integration in a direction reverse to a charging direction for the element characteristic measurement.;COPYRIGHT: (C)2013,JPO&INPIT