Position detector and positioning device

摘要

There is provided a position detector by which output having linearity can be obtained in a wide range, which has a movable member 2 that is magnetized into N-poles 3 and S-poles 4 arranged in a movable direction and two magnetic detection elements 5 that are arranged in the movable direction in face of the movable member 2 and that detect variation of magnetic field, in which there are performed an operation (A-B)/(A+B)+2 when A‰¥0 and A+B‰¥0 (wherein A and B are detection signals of the two magnetic detection elements 5), an operation (A+B)/(B-A) when A<0 and B‰¥0, and an operation (A-B)/(A+B)-2 when B<0, and A+B<0.