Patent ID: 7468604

Claim:
A magnetic detector comprising a detection unit constituted by a magnetic/electric conversion element which has a plurality of segments for detecting the intensity of the applied magnetic field; a magnet arranged for applying a magnetic field to the magnetic/electric conversion element; and a magnetic moving body for varying the magnetic field; wherein, the magnetic/electric conversion element is constituted by at least six segments symmetrically arranged in a direction in which the magnetic moving body rotates maintaining a predetermined pitch with respect to the center line of the magnet that intersects the direction of rotation of the magnetic moving body at right angles; first and second bridge circuits are constituted to include at least two pairs among the segments which are so arranged that the centers of pitch are symmetrical to each other with respect to the center line of the magnet so as to produce outputs accompanying the rotation of the magnetic moving body; and a third bridge circuit is constituted to include at least a pair among the segments having a center of pitch on the center line of the magnet so as to produce an output accompanying the rotation of the magnetic moving body; and wherein, a comparison level of a comparator circuit that shapes the waveform of a differential output signal of the first and second bridge circuits is adjusted relying upon an output signal of the third bridge circuit.