Touch analog front end and touch sensor controller having the same

Touch analog front end and touch sensor controller having the same

A touch analog front-end (AFE) for a touch sensitive screen may include a transmitter configured to charge a touch panel and a receiver configured to sense the touch panel. The receiver may include a charge-to-voltage (C2V) converter configured to convert a change of capacitance received from the to...

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Bibliographische Detailangaben
Hauptverfasser: Kim Bumsoo, Kang Sanghyub, Byun San-ho, Lee Kyunghoon, Park Junchul, Ouh Hyunkyu, Lee Jinchul, Choi Michael, Kim Chadong, Park Hojin, Choi YoonKyung
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A touch analog front-end (AFE) for a touch sensitive screen may include a transmitter configured to charge a touch panel and a receiver configured to sense the touch panel. The receiver may include a charge-to-voltage (C2V) converter configured to convert a change of capacitance received from the touch panel into a voltage signal, a correlated double sampling (CDS) block configured to convert the voltage signal into a differential signal and to sample each of the positive and the negative signals of the differential signal, and an integrator configured to accumulate a difference between the sampled positive and negative signals.