TOUCH-SENSITIVE APPARATUS AND METHOD

Evaluation A touch-sensitive apparatus including: a plurality of electrodes comprising at least a first electrode Rx0 and a second electrode Rx1; drive circuitry 112 configured to generate a drive signal for driving the electrodes; a differential output element 160 comprising two inputs each configured to couple to each of the first and second electrode and configured to output a signal indicative of the differential between input signals; switching circuitry configured 150 to couple the first electrode to either of the first input or second input of the differential output element and to couple the second electrode to either of the first input or second input of the differential output element. The processing circuitry is then configured to: obtain a first output from the differential output element during a first time period, wherein the switching circuitry is in a first configuration; obtain a second output from the differential output element during a second time period, wherein the switching circuitry is in a second configuration; and determine a resultant signal corresponding to a capacitance as sensed by the first or second electrodes based on both the first output and the second output.