Control device and control method
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United States of America Patent
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Aug 15, 2017
Issued Date -
N/A
app pub date -
Jul 29, 2014
filing date -
Mar 28, 2014
priority date (Note) -
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Abstract
A control device, applied to a fan, including a first temperature sensing circuit, a second temperature sensing circuit and a driving circuit. The first temperature sensing circuit is arranged to output an enable signal when the temperature is higher than a first threshold temperature. The driving circuit is enabled by the enable signal, and arranged to output a driving signal with a first driving voltage level to drive the fan. The second temperature sensing circuit is arranged to adjust the driving signal output by the driving circuit from the first driving voltage level to a second driving voltage level so as to adjust the rotation speed of the fan.
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