Patent ID: 8686970
Filing Date: 2014-04-01
Classification: G06F

Abstract:
1. An electronic device, comprising: a touch input device; a clock generation circuit, generating a first clock and a second clock; a touch sensing circuit, coupled to the touch input device and operated under the first clock; a logic circuit, receiving a sensing output signal from the touch sensing circuit and operated under the second clock; and a conversion circuit, outputting an output voltage under control of the logic circuit, the output voltage coupled to the touch sensing circuit, the conversion circuit operated under the second clock; wherein in response to the sensing output signal from the touch sensing circuit, the logic circuit controls the conversion circuit to adjust the output voltage to detect a capacitance variance of the touch input device; wherein within a cycle of the first clock, the touch sensing circuit detects the capacitance variance; and wherein, the clock generation circuit determines a timing length of a first cycle of the second clock according to a resistor capacitor delay time of the touch input device.