| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a miniaturizable current sensor whose detectable current-value range is wide. <P>SOLUTION: In this current sensor, first to fourth magnetoresistive elements 2a-2d are arranged so that a first and third magnetoresistive elements 2a and 2c and a signal magnetic field B are parallel to each other, and second and fourth magnetoresistive elements 2b and 2d and the signal field B are perpendicular to each other. First and second bias magnetic fields B1 and B2 are applied in a direction which forms an angle of 45°with respect to the first and second magnetoresistive elements 2a and 2b, and in a direction which forms the angle of 45°with respect to the third and fourth magnetoresistive elements 2c and 2d respectively. Moreover, the direction of the second bias field B2 is made to be a direction which forms an angle of 180°with respect to the direction of the first bias field B1, or a direction which forms an angle of 90°with respect to the first bias field B1 so that a component parallel to the signal field B becomes opposite in direction to the first bias field B1. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
