Patent ID: 7129700

Claim:
An angle sensor comprising: a magnet; and a magnetic detector arranged such that it faces the magnet so as to detect a relative rotational angle of the magnet and the magnetic detector based on an output of the magnetic detector; wherein a magnetic member is attached to at least one of the N pole and the S pole of the magnet so that a maximum magnetic flux portion of said at least one of the N pole and the S pole is farther away from a neutral detection position of the magnetic detector, and such that a straight line connecting the maximum magnetic flux portion of the N pole and the maximum magnetic flux portion of the S pole is farther away from the magnetic detector than a straight line connecting the center of the N pole and the center of the S pole of the magnet; and the magnet is disposed substantially at the center of a shaft having a generally circular cross section so that the maximum magnetic flux portion is spaced away from the neutral detection position of the magnetic detector in the circumferential direction of the shaft.