Temperature control for Hall bar sensor correction
AssigneeCorephotonics Ltd.
InventorsYiftah Kowal, Michael Scherer
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Abstract
Systems and methods for eliminating or mitigating T-effects on Hall sensors. A system may comprise a magnet-coil arrangement for providing a relative movement therebetween to obtain a relative position, a Hall sensor for sensing the relative movement, a temperature sensor located in proximity of the Hall sensor for providing temperature sensing, and a controller having two or more channels coupled to Hall sensor and to the temperature sensor and configured to control the relative movement and to provide, based on the temperature sensing, a temperature correction input to the Hall sensor for compensating a temperature effect on the Hall sensor sensing.
Claims29
A system, comprising:
- a voice coil motor (VCM) comprising a magnet-coil arrangement for providing a relative movement therebetween to obtain a relative position;
- a Hall sensor located within the coil for sensing the relative movement;
- a temperature sensor located in proximity of the Hall sensor for providing temperature sensing;
- and
- a controller having two or more channels coupled to the VCM, to the Hall sensor and to the temperature sensor and configured to control the relative movement between the magnet and the coil of the VCM and to provide, based on the temperature sensing, a temperature correction input to the Hall sensor for compensating a temperature effect on the Hall sensor sensing of the relative movement.
Dependencies are inferred from the claim text.