MAGNETORESISTIVE SENSOR

摘要

The invention relates to a magnetoresistive sensor, designed for use with a magnetised encoder that comprises a zone containing magnetic north and south poles arranged alternately along a displacement direction. Said sensor comprises a Wheatstone bridge arrangement with a first bridge branch between a first supply connection and a first signal output connection of said arrangement, a second bridge branch between the first supply connection and a second signal output connection of said arrangement, a third bridge branch between a second supply connection and the first signal output connection of said arrangement, in addition to a fourth bridge branch between the second supply connection and the second signal output connection of the Wheatstone bridge arrangement. Each of said bridge branches comprises an ohmic resistance element, whose resistance value depends on the magnetic field strength of a magnetic field that acts on the ohmic resistance element according to a predefined characteristic curve. To further reduce the spatial dimensions, the characteristic curves of the ohmic resistance elements in the first and fourth bridge branch correspond approximately with one another and differ significantly from the characteristic curves of the ohmic resistance elements in the second and third bridge branches, which also correspond approximately with one another.