US 7,397,236 B2 · Magnetic detector

Abstract

The invention provides a magnetic detector that exerts no influence on detection accuracy of a magnetic movable body, being a detected body, even if relative positions of magnetic resistance elements and a magnet are out of alignment due to variation occurred in manufacturing process. A magnetic detector includes: a magnetic field detection part constructed of at least two magnetic resistance elements; a magnet for applying a magnetic field to the magnetic resistance elements; a magnetic movable body for changing the magnetic field that is generated by the magnet; and a processing circuit part for outputting a signal based on the change in resistance values of the magnetic resistance elements due to the change in the magnetic field; and in which a shape of the magnetic resistance elements is symmetric with respect to a point.

Claims8

Dependent claims

A magnetic detector comprising:

a magnetic field detecting part constituted of a bridge circuit, at least two sides of which include magnetic resistance elements, a magnet for applying a magnetic field to said magnetic resistance elements, a magnetic movable body for changing a magnetic field that is generated by said magnet, and a processing circuit part for outputting a signal based on change in resistance values of said magnetic resistance elements due to change in said magnetic field;
wherein each of said magnetic resistance elements is horizontally separated and separately positioned on the processing circuit part in a direction of the rotation of the magnetic movable body and a shape of said magnetic resistance elements is symmetric with respect to a center point of each of said magnetic resistance elements.

Dependencies are inferred from the claim text.

Magnetic detector

Life of this patent

Magnetic detector

Life of this patent

Abstract

Claims8