Magnetic field direction detector
AssigneeAnalog Devices, Inc.
InventorJan Kubík
Life of this patent
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Abstract
A magnetic field direction detector for detecting whether a magnetic flux has a component of field from a first side or a second side of a detection axis; the magnetic field direction detector comprising: a first magneto-resistive sensor; and a perturbation generator; wherein the perturbation generator causes an external magnetic field to be perturbed so as to cause the apparent direction of flux to change by an angle θ1 at the first magneto-resistive sensor.
Claims18
A magnetic field direction detector for detecting whether a magnetic flux has a component of field from a first side or a second side of a detection axis;
- the magnetic field direction detector comprising:
- a first magneto-resistive sensor;
- and
- a perturbation generator;
- wherein the perturbation generator causes an external magnetic field to be perturbed so as to cause the apparent direction of flux to change by an angle θ1 at the first magneto-resistive sensor.
A method of resolving directional uncertainty about the direction of a magnetic field, the method comprising producing a perturbing magnetic field at a magneto-resistive magnetic sensor such that for first direction of magnetic field the resultant combination makes a first observable charge of a parameter of the magnetic field sensor, and for a second direction of magnetic field opposed to the first direction the resultant combination makes a second observable change in a parameter of the magnetic field sensor.
Dependencies are inferred from the claim text.