Abstract: In one embodiment, a method comprises generating a first charge at a capacitor system having a magnitude based on the magnitude of a second charge present at a capacitive node of a touch sensor in the absence of a touch with respect to the capacitive node. The method further includes generating a third charge at the capacitive node of the touch sensor in the presence of a touch with respect to the capacitive node. The first charge and the third charge are summed to cancel out at least a portion of the third charge. The method further includes integrating, by an integrator, the sum of the first charge and the third charge to generate an output voltage.

Abstract: In one embodiment, a method comprises generating a first charge at a capacitor system having a magnitude based on the magnitude of a second charge present at a capacitive node of a touch sensor in the absence of a touch with respect to the capacitive node. The method further includes generating a third charge at the capacitive node of the touch sensor in the presence of a touch with respect to the capacitive node. The first charge and the third charge are summed to cancel out at least a portion of the third charge. The method further includes integrating, by an integrator, the sum of the first charge and the third charge to generate an output voltage.

Abstract: In one embodiment, a method includes communicating a first voltage to a drive line of a touch sensor; setting a sense line of the touch sensor to a predetermined voltage; and communicating a second voltage to the drive line. A resulting transition at the drive line from the first voltage to the second voltage causes an amount of charge accumulated on the sense line to be communicated to an integrator. The method also includes, at the integrator, integrating the amount of charge communicated from the sense line to convert the amount of charge to an output voltage. The method also includes restoring the sense line to the predetermined voltage.