Patent ID: 6222361
Filing Date: 2001-04-24
Classification: G01R

Abstract:
A position detection device, comprising:a magnetized material having a signal magnetic field affording position information recorded thereon; anda magneto-resistive effect sensor arranged for relative movement with respect to a recording direction of the signal magnetic field recorded along a longitudinal axis of said magnetized material, whereinsaid magneto-resistive effect sensor has a magnetically sensitive area for receiving from said magnetized material said signal magnetic field formed of various magnitudes transverse to said longitudinal axis along a lengthwise current flowing direction of said magnetically sensitive area of,the magnetically sensitive area of said magneto-resistive effect sensor having in a direction perpendicular to said current flowing direction a set predetermined varying width that varies according to the various magnitudes of said signal magnetic field, anda direction of said relative movement of said magneto-resistive effect sensor with respect to said magnetized material is perpendicular to said lengthwise current flowing direction and parallel to said longitudinal axis of said magnetized material.