Patent ID: 8432158

Claim:
A magnetic sensor apparatus, comprising: a magnet located proximate to a ferrous target having a circular track, wherein the magnet generates a magnetic field between the magnet and the circular track of the ferrous target; and a plurality of intertwined magnetoresistive sensors occupying the same space on a substrate such that the plurality of intertwined magnetoresistive sensors sense changes in the magnetic field generated by the magnet, said plurality of intertwined magnetoresistive sensors comprising a first magnetoresistive sensor offset from a second magnetoresistive sensor, wherein said first magnetoresistive sensor and said second magnetoresistive sensor together produce output signals representative of magnetic flux of the magnetic field generated by the magnet and flowing through said first magnetoresistive sensor and said second magnetoresistive sensor, wherein said first magnetoresistive sensor and said second magnetoresistive sensor are reactive to gap and angular changes in said circular track of said ferrous target, such that said output signals from said first magnetoresistive sensor and said second magnetoresistive sensor are naturally shifted in phase in order to achieve a magnetically biased magnetoresistive speed and direction sensor.