| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a current sensor capable of reducing the probability of erroneous detection.SOLUTION: A current sensor 11 comprises: a first abnormality comparator 17; and a second abnormality comparator 23 that output an abnormality flag FF when first ohmic value R1 of a first magnetoresistive element 13 is larger than a predetermined first abnormal ohmic value R1, or when a second ohmic value R2 of a second magnetoresistive element 19 is larger than a predetermined second abnormal ohmic value FR2. The value of a first magnetic field H1 is larger than a maximum magnetic field Hmax of a magnetic field detection range and the value of a second magnetic field H2 is smaller than a minimum magnetic field Hmin of the magnetic field of detection range. When the abnormality flag FF is output from at least one of the first abnormality comparator 17 and the second abnormality comparator 23, an abnormality determination section 27 of the current sensor 11 outputs an abnormal signal E, and when the abnormality flag FF is not output, the abnormality determination section 27 of the current sensor 11 outputs a differenceΔS between a first output S1 from the first magnetoresistive element 13 and a second output S2 from the second magnetoresistive element 19 as a sensor output So.</p> |
