Integral type current-voltage conversion circuit, current measuring device and resistance measuring device

摘要

PROBLEM TO BE SOLVED: To convert a current having a large current value into a voltage by integration in a prescribed elapsed time even if the capacitance value of an integrating capacitor has an upper limit. SOLUTION: An operational amplifier 14 having a feedback circuit 15 connected between an inverting input terminal and an output terminal is provided, and a detection current I is converted into a detection voltage Vo and outputted. Feedback circuit 15 includes a capacitor