| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic sensor which can reduce the effect thereof and which can reduce the measuring error even when the output current of a power supply fluctuates. SOLUTION: The output current of the power supply supplied from a power supply circuit 5 to a sensor element driving circuit 2, a receiving circuit 3, a digital signal circuit 4, or the like is detected by a current detection circuit 11. The output current detection voltage is compared with the set voltage of a current setting circuit 13 by a comparison circuit 12. When the output current is small, it is controlled so that the current flowing through a load circuit 14 is increased so that the output current is at the set current. In contrast, when the output current is large, it is controlled so that the current flowing through the load circuit 14 is decreased so that the output current is at the set current. Accordingly, the output current is kept constant. COPYRIGHT: (C)2005,JPO&NCIPI
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