| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotational angle sensor for accurately detecting a rotational angle with a simple configuration by equipping a magnetic body ring material outside a magnet and a Hall element. SOLUTION: In the rotational angle sensor that has a rotary shaft 1 and a magnet 2 and a Hall element 3 at positions where a relative position relationship changes due to the rotation of the rotary shaft 1, and detects the rotational angle of the rotary shaft 1 according to the output of the Hall element 3, a magnetic body ring material 4 is provided outside the magnet 2 and the Hall element 3. COPYRIGHT: (C)2003,JPO
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