Method and apparatus for correcting the evaluation of switching points in a magnetic sensor

a method is proposed for correcting the evaluation of the switching points in a magnetic sensor, wherein the switching edges caused by a displaced encoder member are recognized by the fact that the passage above or below of a threshold value causes the emission of a signal. During a measurement cycle, an individual threshold value is fixed (11) to each switching edge respectively determining the maximum and the minimum of each flank switching and storing non-volatile way the resultant average value as individual threshold value (11).