CPC G06F 3/0446 (2019.05) [G06F 3/0418 (2013.01); G06F 3/04162 (2019.05); G06F 3/04166 (2019.05)] | 20 Claims |
1. A touch-sensitive panel, comprising:
a plurality of row electrodes;
a plurality of column electrodes;
a plurality of drive-sense circuits coupled to the plurality of row electrodes and the plurality of column electrodes, and configured to detect changes in impedances of the plurality of row electrodes and the plurality of column electrodes;
a plurality of analog-to-digital converters coupled to outputs of the drive-sense circuits;
a processing module coupled to the plurality of drive-sense circuits via the plurality of analog-to-digital converters, the processing module, the analog-to-digital converters, and the plurality of drive-sense circuits configured to:
sense an information signal capacitively coupled to the plurality of row electrodes and the plurality of column electrodes, wherein the information signal includes modulated data wherein the modulated data includes a plurality of frequency components representing an identification code;
extract the modulated data from the information signal, and
identify a device that produced the information signal based on the identification code.
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