Thermal compensation of an exponential pair
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United States of America Patent
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Oct 5, 2010
Grant Date -
Sep 16, 2010
app pub date -
Mar 11, 2009
filing date -
Mar 11, 2009
priority date (Note) -
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Abstract
To compensate for changes in temperature, a pair of bipolar transistors is connected to a voltage divider and receives a differential voltage that varies with temperature. The voltage divider includes a set of resistors placed in parallel. The set of resistors has a resistance that changes with temperature. As the resistance changes with temperature, the differential voltage provided by the voltage divider changes in proportion to a change in thermal voltage.
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