Capacitor Sensor Circuit with Rectifier and Integrator
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Dec 23, 2013
filing date -
Dec 23, 2013
priority date (Note) -
Abandoned
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Abstract
A capacitor sensor circuit may be used in application such as touch screens. The capacitor sensor circuit includes a transimpedance amplifier, a filter module, a rectifier, an integrator and an analog to digital converter. Since a transmission signal fed into the capacitor sensor circuit has been preprocessed through the rectifier and the integrator, the analog to digital converter to be used can be a low speed analog to digital converter that has lower power consumption and a lower cost of manufacturing compared to a high speed analog to digital converter.
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