TEMPERATURE VARIATION SENSING APPARATUS AND METHOD THEREOF
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United States of America Patent
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Issued Date -
Mar 1, 2012
app pub date -
Apr 18, 2011
filing date -
Aug 30, 2010
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Abandoned
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Abstract
A temperature variation sensing apparatus and a method thereof are provided. The temperature variation sensing apparatus includes a sensing unit and a control unit. The sensing unit senses a variation in temperature to generate a temperature difference signal, while the control unit executes a program code to determine a non-trigger range based on the ambient temperature. When the level of the temperature difference signal is out of the non-trigger range, the control unit generates a control signal, wherein of the non-trigger range varies with the ambient temperature and forms a first curve. The first curve includes at least one first extreme point; the product of slopes of the first curve on two ends of the first extreme point is negative. Software is utilized to perform temperature compensation. As a result, a better sensitivity curve is obtained and the sensing accuracy is accordingly enhanced.
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