This current sensor circuit is exclusive for large current measuring. The general specifications are the as those of open loop A-type described above. The characteristic of this circuit type is that it is made up of 2-mode output terminals of normal and reverse outputs. Therefore, it can be effectively used in eliminating common mode noise in between lines by configuring input circuit as differential circuit. Through simultaneous use of both normal and reverse directions, this circuit type can also increase the efficiency of system design.