ELECTRIC CURRENT MEASURING CIRCUIT

摘要

PURPOSE:To provide an electric current measuring circuit capable of measuring output electric current in a circuit to be measured in a wide range from small electric current to large electric current. CONSTITUTION:A resistance having a resistance value hardly restricting output electric current in a circuit to be measured is connected between electric current output terminals of the circuit to be measured, and a differential amplification circuit 1 to amplify/output potential difference between both edges of this connected resistance is connected to both edges of the resistance. By measuring voltage outputted from the differential amplification circuit 1, the output electric current in the circuit to be measured can be measured.