| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current sensor which will not cause errors in the detected magnitude of current, even when there is action from external magnetic field. <P>SOLUTION: A bias magnet 31 is disposed on a surface 51a of a substrate 51, and an MRE 21 is disposed between the bias magnet 31 and a bus bar 90. A bias magnet 32 is disposed opposite to the bias magnet 31 across the bus bar 90, and an MRE 22 is disposed between the bias magnet 32 and the bus bar 90. The MREs 21, 22 are connected to a differential amplifier circuit 53. Since the variation in the output voltage of each MRE generated by the external magnetic field is identical, errors will not be generated in the output of the differential amplifier circuit 53. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
