| 摘要 |
PROBLEM TO BE SOLVED: To provide magnetic sensor which will not malfunction even without a special noise-processing circuit. SOLUTION: A magnetic sensor is composed of a magnetoresistance element 12, a magnet for applying a bias magnetic field to the magnetoresistance element 12, and the like. The magnetoresistance element 12 consists of a substrate 22, a magnetism-sensitive part 23 set to an upper face 22a of the substrate 22, and terminal electrodes 24a and 24b set to both of end parts of the substrate 22. The magnetism-sensitive part 23 is formed of a serpentine magnetoresistance pattern 26 to obtain a predetermined magnetic reluctance value, with having a rectangular area as indicated by a chain line. The magnetoresistance element 12 is arranged to make a longitudinal direction of the magnetism-sensitive part 23 parallel to a direction K in which an object to be detected passes.
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