Method for determining temperature of an active pixel imager and automatic correcting temperature induced variations in an imager
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United States of America Patent
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Feb 10, 2009
Grant Date -
Sep 2, 2004
app pub date -
Mar 12, 2004
filing date -
Nov 8, 2002
priority date (Note) -
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Abstract
An imager temperature sensor and a current correction apparatus are provided which use dark pixel measurements from an imager chip during operation together with a fabrication process constant as well as a chip dependent constant to calculate chip temperature. The chip temperature may be used to generate a current correction signal. The correction signal is used to tune a current on the imager chip to correct for temperature variations.
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