Abstract: A touch sensor includes a touch panel including driving lines, sensing lines, and a node capacitor formed between a driving line and a sensing line adjacent to one another, a driver for providing a driving signal to each of the driving lines, a sensor for converting a digital signal received from the sensing lines using an oversampling scheme to an oversampled digital signal; and a digital signal processor for downsampling the oversampled digital signal and filtering the downsampled digital signal, wherein, the digital signal processor generates the driving signal in response to a driving clock signal, and the driving signal includes a signal section for driving of the driving lines and a sink section for synchronizing the driving signal and the downsampled digital signal.