Device and method for reducing input noise
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United States of America Patent
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Mar 2, 2010
Grant Date -
May 14, 2009
app pub date -
Mar 3, 2008
filing date -
Nov 9, 2007
priority date (Note) -
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Abstract
A device and a method for reducing input noise providing at least a microcontroller. The microcontroller comprises: at least a noise reduction device, at least an analog switch and at least a signal output unit. The noise reduction device connected to the ground or a voltage is turned on to charge or discharge a stray capacitor existing on a turned off analog switch so that the amount of charge stored in the stray capacitor is zero or a specific value. Thereby, the noise in a touch switch is reduced and the cost of layout on the PCB is saved.
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