POSITION SENSOR WITH IMPROVED MAGNETIC STRAY FIELD IMMUNITY

The invention relates to a method for determining the absolute position of a mobile element (4), at which a source of a magnetic field (5) is fastened, relative to three magneto-sensitive sensors (1, 2, 3), by which a first differential signal (101) and a second differential signal (102) are determined based on the signals of the three magneto-sensitive sensors. This is attained such that the amplitude ratio (105, 106) of the respective differential signals (101, 102) and the off-set values (103, 104) about the respective zero point of the sensor signals (11, 12, 13) are determined from the minimum and maximum values of the differential signals (101, 102), and from these values, scaled signals (107, 108) are calculated a sum signal (109) and a third differential signal (110), which in turn are scaled (111, 112), with the determination of the minimum and the maximum values occurring by a relative movement of the element (4) and the source of the magnetic field (5) fastened thereat over a full range of motion, and that an absolute position is calculated via the scaled sum signal (113) and the scaled third differential signal (114). The invention further relates to a corresponding device (10).