Carrier touch sensing system capable of performing phase calibration and carrier signal demodulation

The invention discloses a carrier touch sensing system that includes a driving circuit for generating driving signals; a touch panel coupled to the driving circuit and used for generating carrier sensing signals according to the driving signals; and a demodulation circuit coupled to the touch panel and used for performing in-phase and quadrature demodulations to the plurality of carrier sensing signals to generate and store a plurality of phase delay information if the carrier touch sensing system operates in a phase calibration mode, and performing in-phase demodulation to the plurality of carrier sensing signals according to the plurality of phase delay information to generate a plurality of touch signals if the carrier touch sensing system operates in a normal scan mode. 本发明公开了种载波触控感应系统，包含有驱动电路，用来产生多个驱动信号；触控面板，耦接于该驱动电路，用来根据该多个驱动信号，产生多个载波感应信号；以及解调电路，耦接于该触控面板；其中当该载波触控感应系统操作于相位校正模式时，该解调电路用来对该多个载波感应信号进行同相解调及正交解调，以产生并储存多个相位延迟信息；其中当该载波触控感应系统操作于常规扫描模式，该解调电路根据该多个相位延迟信息，对该多个载波感应信号进行同相解调，以产生多个触控信号。