Inducing capacitance detector and capacitive position detector of using same
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United States of America Patent
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Apr 4, 2017
Grant Date -
May 5, 2011
app pub date -
Nov 2, 2009
filing date -
Nov 2, 2009
priority date (Note) -
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Abstract
One aspect of the present invention relates to an inducing capacitance detector. In one embodiment, the inducing capacitance detector has an input terminal for receiving a supply voltage; a capacitive sensor array with a first output terminal and a second output terminal; an operational amplifier having an inventing input terminal electrically connected to the first output terminal of the capacitive sensor array, a non-inventing input terminal electrically connected to the second output terminal of the capacitive sensor array and the input terminal, and an output terminal for outputting an output signal, a feedback capacitor electrically connected between the inventing input terminal and the output terminal of the operational amplifier.
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