Fan control system
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United States of America Patent
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Dec 4, 2012
Grant Date -
Aug 2, 2012
app pub date -
Apr 10, 2012
filing date -
Oct 20, 2009
priority date (Note) -
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Abstract
A fan control system includes a temperature detecting circuit and a rotation rate control circuit. The detecting circuit includes a first amplifier, a second amplifier, and a thermistor. The rotation rate control circuit includes a first terminal, a second terminal, and a third terminal. The detecting circuit detects temperature and outputs a voltage signal. The rotation rate control circuit receives the voltage signal and controls the rotation rate of the fan according to the voltage signal.
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