Temperature sensing apparatus
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United States of America Patent
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Jul 14, 1998
Grant Date -
N/A
app pub date -
Nov 1, 1996
filing date -
Nov 1, 1996
priority date (Note) -
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Abstract
A temperature sensing apparatus (200), includes a temperature sensor (220), a current source (203), and a temperature independent voltage source (240, 250). The current source (203) provides a biasing current to the temperature sensor (220), and the voltage source (240, 250) is programmable to adjust the output of the temperature sensor (220). Preferably, the voltage source (240, 250) includes a variable current source (240) and a resistive element (250) with counterbalanced temperature coefficients, and the bias current source (203) is selected to have a counterbalancing temperature coefficient to that of the resistive element (250).
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