Temperature sensing circuit and method
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United States of America Patent
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Jul 9, 2013
Grant Date -
Apr 7, 2011
app pub date -
Oct 7, 2009
filing date -
Oct 7, 2009
priority date (Note) -
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Abstract
A low cost, low power and low noise temperature sensor circuit is disclosed. A control circuit asserts a start signal and a stop signal, causes a pulse generating circuit to generate a finite number of pulses, whose pulse frequency varies with temperature. A counter counts the finite number of pulses and outputs the count which can be used to represents the temperature. Further, the pulse generating circuit includes a delay circuit, a pulse width controlling circuit, and a synchronizer with asynchronous clear.
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