Patent ID: 8736257
Filing Date: 2014-05-27
Classification: G01D

Abstract:
1. An integrated circuit for measuring an angular position of a rotating magnet field at a radially off-center position from an axis of rotation of the magnetic field, the integrated circuit comprising: a first set of magnetoresistive elements and an associated first plurality of switches which can be operated to selectively interconnect different subsets of the first set of magnetoresistive elements to form a first sensing bridge at different positions within the integrated circuit, the first sensing bridge configured to provide a first signal representative of a first directional component of the magnetic field; and a second set of magnetoresistive elements and an associated second plurality of switches which can be operated to selectively interconnect different subsets of the second set of magnetoresistive elements to form a second sensing bridge at different positions within the integrated circuit, the second sensing bridge configured to provide a second signal representative of a second directional component of the magnetic field; wherein switches of the first and second pluralities of switches are operated such that the resulting first and second bridges are at positions within the integrated circuit that minimize errors in the first and second signals resulting from non-uniformity of the magnetic field at the radially off-center position.