Differential transformer type magnetic sensor
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United States of America Patent
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Mar 31, 2015
Grant Date -
Apr 25, 2013
app pub date -
Oct 16, 2012
filing date -
Oct 20, 2011
priority date (Note) -
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Abstract
A differential transformer type magnetic sensor is disclosed. The drive coil includes a planar coil arranged on a substrate. The first differential coil includes a planar coil arranged on the substrate. The second differential coil includes a planar coil arranged on the substrate and connected to the first differential coil. The first selector unit is used for a zero adjustment of a differential transformer. The first differential coil includes a plurality of first branch lines formed by branching a wire material forming the outermost turn of the first differential coil. The plurality of first branch lines are so arranged that the amount of magnetic fluxes passing along the plurality of respective first branch lines differ when the drive coil is driven. The first selector unit is capable of selecting any one of the plurality of first branch lines and arranged on the substrate.
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