Magnetic sensing device

A magnetic sensing device, comprising:

• a magnetic multi-turn sensor configured to detect a number of turns of a rotating magnetic field;
• an angle sensor configured to detect an orientation of the rotating magnetic field, the angle sensor having a resolution of 180 degrees;
• and
• a quadrant detector comprising at least two magnetoresistive elements, the quadrant detector being configured to detect a quadrant of a magnetic field angle of the rotating magnetic field,
• wherein the magnetic multi-turn sensor comprises a plurality of magnetoresistive elements connected in series and physically laid out in a spiral configuration, wherein the quadrant detector and the magnetic multi-turn sensor are integrated, such that at least two magnetoresistive elements of the plurality of magnetoresistive elements provide the quadrant detector, wherein the magnetic multi-turn sensor further comprises a matrix of electrical connections arranged to electrically connect magnetoresistive elements of the plurality of magnetoresistive elements to other magnetoresistive elements of the plurality of magnetoresistive elements, the matrix being at least three by three.

A method of monitoring a rotating magnetic field, comprising:

• detecting a number of turns of the rotating magnetic field using a magnetic multi-turn sensor;
• detecting an orientation of the rotating magnetic field using an angle sensor having a resolution of 180 degrees;
• detecting a quadrant of a magnetic field angle of the rotating magnetic field using a quadrant detector, the quadrant detector comprising at least two magnetoresistive elements and at least one domain wall generator;
• and
• injecting, using the at least one domain wall generator, domain walls into the quadrant detector as the magnetic field rotates;
• wherein the number of turns is determined based at least in part on the detected orientation and the detected quadrant.