Position sensor utilizing a linear hall-effect sensor
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United States of America Patent
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Jan 23, 2007
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app pub date -
Feb 13, 2004
filing date -
Feb 14, 2003
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Abstract
A magnetic field assembly and method of configuring the same for use in position sensors of the type which include a magnetic field sensor. First and second magnets in the field assembly are positioned on a surface of a magnetic plate (return path) and separated from one another by a separation distance. The first magnet has a magnetic axis substantially transverse to the surface of the magnetic plate, and the first magnet has a polarity opposite a polarity of the second magnet. The thicknesses of the first and second magnets are selectively varied along a stroke direction, and the separation distance is selected along with a gap length distance between the magnetic sensor and the field assembly, so that a predetermined flux density versus stroke characteristic can be provided for the position sensor.
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