Patent ID: 8754867

Claim:
A method for obtaining a plurality of values used to generate an image of touch from touch sensor circuitry, comprising: simultaneously applying a plurality of stimulation signals including positive and negative phases of a plurality of different stimulation frequencies to a plurality of drive lines of the touch sensor circuitry in a particular distribution, wherein one stimulation signal is applied to each of the drive lines; receiving a sense signal from each of a plurality of sense lines of the touch sensor circuitry into a different sense channel; demodulating the sense signal received into each sense channel with demodulation signals at a plurality of different demodulation frequencies, each demodulation frequency being the same frequency as one of the stimulation frequencies, the demodulation signals at each demodulation frequency being in-phase with either the positive or negative phase of the corresponding stimulation signal; accumulating the sense signals demodulated with the plurality of demodulation frequencies in each sense channel to generate a plurality of values representing the accumulated demodulated sense signals for each sense channel; and storing the plurality of values for all sense channels.