Patent ID: 8552994
Filing Date: 2013-10-08
Classification: G01R,H03K

Abstract:
1. A touch sensor system, comprising: at least one input port to receive an input signal from at least one electrode, the at least one electrode having a capacitance; an Analog to Digital Converter (ADC) having an ADC input and an ADC output; a capacitor coupled to the ADC input; a multiplexer (MUX) having multiple MUX inputs and a MUX output that is coupled to the ADC input, wherein the at least one input port is coupled to one of the multiple MUX inputs; a first switch for coupling a first reference voltage to a first input of the multiple MUX inputs; a second switch for coupling a second reference voltage to the first input of the multiple MUX inputs; a switch controller operable to: a sensor controller operable to: