Patent ID: 11907484
Assignee: SIGMASENSE, LLC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. A touch sensor device (TSD) comprising:
a plurality of TSD electrodes associated with a surface of the TSD;
a plurality of drive-sense circuits (DSCs) operably coupled to the plurality of TSD electrodes, wherein:
a first DSC of the plurality of DSCs is operably coupled to receive a first reference signal and to generate a first TSD electrode signal based on the first reference signal, wherein, when enabled, the first DSC configured to:
provide the first TSD electrode signal to a first TSD electrode of the plurality of TSD electrodes and simultaneously to sense a change of the first TSD electrode signal based on a change of impedance of the first TSD electrode; and
generate a first digital signal that is representative of the change of impedance of the first TSD electrode;

a second DSC of the plurality of DSCs is operably coupled to receive a second reference signal and to generate a second TSD electrode signal based on the second reference signal, wherein, when enabled, the second DSC configured to:
provide the second TSD electrode signal to a second TSD electrode of the plurality of TSD electrodes and simultaneously to sense a change of the second TSD electrode signal based on a change of impedance of the second TSD electrode; and
generate a second digital signal that is representative of the change of impedance of the second TSD electrode;

memory that stores operational instructions; and
one or more processing modules operably coupled to the plurality of DSCs and the memory, wherein, when enabled, the one or more processing modules configured to execute the operational instructions to:
generate the first reference signal and provide the first reference signal to the first DSC;
generate the second reference signal and provide the second reference signal to the second DSC;
process the first digital signal and the second digital signal to determine the change of impedance of the first TSD electrode and the change of impedance of the second TSD electrode; and
process the first digital signal and the second digital signal to determine a second impedance signature that corresponds to another change of impedance of the first TSD electrode and another change of impedance of the second TSD electrode.