POSITION SENSOR
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United States of America Patent
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Issued Date -
Apr 22, 2010
app pub date -
Oct 19, 2009
filing date -
Oct 19, 2008
priority date (Note) -
Abandoned
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Abstract
A position sensing device (PSD) comprising: a light source that provides light responsive to current that it receives; a power source that provides current to the light source through a load line; a photodetector that receives an amount of light from the light source that is a function of position of the light source relative to the photodetector; and an integrated circuit comprising an I/O port connected to the light source and having a plurality of selectable states; wherein different selectable states determine different values for the load line and therefore current provided to the light source.
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