Patent ID: 7084619

Claim:
An arrangement for determining the direction of movement of a motion sensor element which, in a first zone having a first pitch and extending in the form of strips along a motion co-ordinate describing a movement of the motion sensor element, comprises periodically recurrent areas alternately influencing a first magnetic field, and, in a second zone having a second pitch and extending in the form of strips along the motion co-ordinate, comprises periodically recurrent areas alternately influencing a second magnetic field, the arrangement comprising a first sensor element for detecting the influence on the first magnetic field by the first zone of the motion sensor element, and a second sensor element for detecting the influence on the second magnetic field by the second zone of the motion sensor element, the first pitch of the first zone being in an odd, integral ratio to the second pitch of the second zone, and wherein the first zone comprises two sub-zones extending along the motion co-ordinate of the motion sensor element and having the same, first pitch of periodically recurrent areas alternately influencing the magnetic field, which sub-zones are offset at least substantially by half a period of the first pitch in the direction of the motion co-ordinate of the motion sensor element.