Clothes dryer moisture sensing circuit
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United States of America Patent
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Mar 18, 2008
Grant Date -
Nov 2, 2006
app pub date -
Apr 27, 2006
filing date -
Apr 28, 2005
priority date (Note) -
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Abstract
A moisture sensing circuit for a clothes dryer in which clothes tumble during drying has a pair of spaced apart electrode sensors for sensing the electrical resistance of the clothes when the clothes contact the electrodes. The circuit has an active filter for suppressing noise related to the operating line frequency of the clothes dryer to provide a filtered voltage signal representative of voltage drop across the electrode sensors with the line frequency noise suppressed.
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