Signal processing circuit for processing sensing signal from touch panel
AssigneeNovatek Microelectronics Corp.
InventorTsen-Wei Chang
Life of this patent
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Abstract
A signal processing circuit is provided. The signal processing circuit includes an analog-front-end circuit and a filter circuit. The analog-front-end circuit is configured to receive a sensing signal from a touch panel and perform a signal capture operation on the sensing signal to output a current signal. The filter circuit is coupled to the analog-front-end circuit. The filter circuit is configured to receive the current signal from the analog-front-end circuit and perform a signal filter operation on the current signal to output a first voltage signal. The filter circuit includes an anti-aliasing filter and a comb filter coupled in series.
Claims9
A signal processing circuit comprising:
- an analog-front-end circuit configured to receive a sensing signal from a touch panel, perform a signal capture operation on the sensing signal to output a current signal;
- and
- a filter circuit coupled to the analog-front-end circuit and configured to receive the current signal from the analog-front-end circuit and perform a signal filter operation on the current signal to output a first voltage signal,
- wherein the filter circuit comprises an anti-aliasing filter and a comb filter coupled in series.
Dependencies are inferred from the claim text.