ENERGIZATION CIRCUIT AND IMPEDANCE MEASURING CIRCUIT

PROBLEM TO BE SOLVED: To provide an energization circuit for determining whether a section between electrodes to come into contact with a measuring object is open or not by a simple configuration without causing inconvenience.SOLUTION: A first electrode 1 and a second electrode 2 to come into contact with a measuring object respectively are electrically connected to an inverting input terminal 11b and an output terminal 11c of an operational amplifier 11. A power supply 80 is electrically connected to the inverting input terminal 11b of the operational amplifier 11 via an input resistance Rin. This energization circuit is configured to apply a prescribed energizing current to the measuring object 90 via the first electrode 1 and the second electrode 2 by an amplification operation by the operational amplifier 11 according to a change in a power supply voltage fed by the power supply 80. A determination section 30 determines whether the measuring object 90 comes into contact with the first electrode 1 and the second electrode 2 or the section between the first electrode and the second electrode 2 is open based on the inverting input terminal voltage Vgenerated in the inverting input terminal 11b.