CPC G06F 3/04166 (2019.05) [G06F 3/0441 (2019.05); G06F 3/0442 (2019.05)] | 13 Claims |
1. A touch sensing circuit comprising:
an analog signal processing circuit configured to receive a plurality of sensing signals having different frequencies from touch electrodes in a same period, the plurality of sensing signals including a first sensing signal corresponding to a driving signal of a touch panel and a second sensing signal corresponding to a downlink signal of a stylus pen; and
a digital signal processing circuit configured to receive output data of the analog signal processing circuit and to perform a discrete Fourier transform with respect to the output data,
wherein the digital signal processing circuit separates the first signal having a frequency of the driving signal of the touch panel and the second signal having a frequency of the downlink signal of the stylus pen by the discrete Fourier transform, wherein the frequency of the first signal and the frequency of the second signal are different.
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