CAPACITOR SENSOR APPARATUS AND SENSING METHOD THEREOF
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United States of America Patent
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Nov 29, 2016
filing date -
Jun 28, 2016
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Abstract
A capacitor sensor apparatus and a sensing method thereof are provided. Oscillation signals with different frequencies are provided to a driving circuit and a mixer separately. The mixer mixes the oscillation signal with a lower frequency with a band-pass filtered signal. A band-pass filtering operation for generating the band-pass filtered signal is performed on a sensing signal before the mixer performs the mixing operation.
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