| 摘要 |
PURPOSE:To obtain a detector which is not affected by temperature by compensating temperature characteristics between 1st and 2nd magnetic sensors. CONSTITUTION:A magnetic sensor 22 adjoining to a magnetic sensor 21 consists of element 22-b and 22-a arranged nearly at right angles to an element 22-a facing a magnet area 12 so that the sensor is not affected by the element 22-a and the area 12. Consequently, the sensor 21 operates to cancel variation by an increase in the output of an amplifier A2 indicated by the sensor 22 which is formed and arranged integrally corresponding to a drop (or rise) in the voltage between connection points (a) and (b) of a bridge constitution part and the voltage between output-side connection points (c) and (d) as intermediate points, i.e. the input electric power of an amplifier A1, therefore, its output voltage as the magnetic flux of an opposite magnet 11 decreases (or increases) with temperature.
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