Magnetic field orientation sensor

Details Magnetic field orientation sensor Magnetic field orientation sensor

2011-06-21

2011-06-21

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Magnetic

Magnetometers

C324S207200

Reexamination Certificate

active

07965076

ABSTRACT:
A magnetic angle sensor100comprises a bulk substrate; a circular well101provided upon the bulk substrate; an even numbered plurality of electrodes102a-102xspaced at regular intervals in a ring formation over the circular well; and a pair of biasing electrodes for selectively applying a progressive succession of differently directed bias currents104to and/or using the said ring of electrodes102to provide a succession of Hall potentials indicative of the relative magnitude of successive differently oriented magnetic field components B in the plane of the magnetic angle sensor100. The sensor100operates cyclically and the full progressive succession cycle involves applying and/or using each electrode102in the ring at least once for applying a bias current and/or sensing a Hall potential. In such a manner, the full cycle comprises the progressive succession of the axis of measurement of the sensor100through a complete rotation within the plane of the sensor. By monitoring the phase of the generated signal or monitoring the zero crossings of the generated signal the orientation of the magnetic field coin the plane of the sensor can be determined.

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