Magnetoresistive angle sensor having several sensing elements
AssigneeKoninklijke Philips Electronics N.V.
InventorDerk Jan Adelerhof
Life of this patent
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Abstract
A magnetoresistive angular sensor (1) is provided which determines a magnetic field direction. A high angular accuracy over a wide range of magnetic field strengths is obtained. The magnetoresistive angular sensor comprises a main sensing element (2) which is electrically connected to a first correction sensing element (6) with a first reference magnetization axis (9) and a second correction sensing element (8) with a second reference magnetization axis (10), the first (9) and the second (10) reference magnetization axes making correction angles Θ between 5° and 85° of opposite sign with the main reference axis (3).
Claims8
A sensor arrangement including a first and a second magnetoresistive sensor (1), comprising a main sensing element (2) with a main reference magnetization axis (3), for determining an angle between the main reference magnetization axis (3) and a magnetic field direction, characterized in that the main sensing element (2) is electrically connected to a first correction sensing element (6) with a first reference magnetization axis (9) and a second correction sensing element (8) with a second reference magnetization axis (10), the first (9) and the second (10) reference magnetization axes making correction angles Θ between 5° and 85° of opposite sign with the main reference axis (3), and in that the main reference magnetization axis (3) of the second sensor is rotated over a quarter period of a periodic output signal of the main sensing element of he first sensor and the correction angles being ⅛ period for each correction sensing element.
Dependencies are inferred from the claim text.