Differential magnetic field sensor structure for orientation independent measurement

A system comprising:

• a rotational target having a target profile;
• and
• a differential magnetic field sensor positioned in proximity to the target profile;
• wherein the differential magnetic field sensor comprises:
• a first differential channel comprising a first pair of magnetic field sensing elements and having an associated first sensing axis defined by the first pair of magnetic field sensing elements;
• a second differential channel comprising a second pair of magnetic field sensing elements and having a second sensing axis defined by the second pair of magnetic field sensing elements;
• wherein the second sensing axis is not aligned with respect to the first sensing axis, and the first sensing axis is positioned relative to a reference axis of a target profile, the reference axis aligned with a direction of motion of the target profile, to define an orientation angle between the first sensing axis and the reference axis;
• and
• circuitry, coupled to the magnetic field sensing elements, to produce an output signal having an amplitude that is independent of orientation angle.