Magnetic multi-turn sensor
AssigneeAnalog Devices International Unlimited Company
InventorsJan Kubik, Jochen Schmitt, Fernando Franco
Life of this patent
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Abstract
Aspects of the present disclosure provide a magnetoresistive track for use in a magnetic multi-turn sensor, the magnetoresistive track comprising one or more looped sections. The looped sections can include a crossing where the magnetoresistive track crosses itself at substantially 90 degrees. In some cases, the looped portions may be further provided with syphon structures to prevent domain walls propagating around the magnetoresistive track as an external magnetic field rotates from becoming stuck at the crossing or propagating in the wrong direction at the crossing.
Claims20
A magnetic multi-turn sensor, comprising:
- at least one magnetoresistive track extending in a closed loop configuration and comprising one or more looped sections,
- wherein each of the one or more looped sections encloses a respective area, and
- wherein each of the one or more looped sections comprises a first section of magnetoresistive track and a second section of magnetoresistive track, wherein the first section of magnetoresistive track and the second section of magnetoresistive track are configured to overlap at a crossing, a curved section of magnetoresistive track extending between the first section of magnetoresistive track and the second section of magnetoresistive track.
A magnetic multi-turn sensor, comprising:
- at least two magnetoresistive tracks, each of the at least two magnetoresistive tracks extending in a closed loop configuration and comprising one or more looped sections,
- wherein each of the one or more looped sections comprises a first section of magnetoresistive track and a second section of magnetoresistive track, wherein the first section of magnetoresistive track and the second section of magnetoresistive track are configured to overlap at a crossing, a curved section of magnetoresistive track extending between the first section of magnetoresistive track and the second section of magnetoresistive track, and
- wherein each of the at least two magnetoresistive tracks comprises a different number of looped sections.
Dependencies are inferred from the claim text.