ELECTRET INPUT DEVICE AND METHOD FOR OPERATING THE SAME
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United States of America Patent
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Issued Date -
Feb 28, 2013
app pub date -
Aug 10, 2012
filing date -
Aug 26, 2011
priority date (Note) -
Abandoned
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Abstract
A method for operating an electret input device includes the following steps. An input signal is received. It is determined whether a voltage level of the input signal is greater than a first preset value. If the voltage level is greater than the first preset value, the voltage level is compared with a second preset value to determine whether the input signal is an effective signal. If the input signal is the effective signal, the position value of the input signal is obtained. Then, the position value is compared with a preset position value to determine an input state of the electret input device. Finally, the input signal is converted to an output signal to be outputted.
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