Patent ID: 11861082
Assignee: SIGMASENSE, LLC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. A system including an electronic pen (e-pen) and a touch sensor device comprising:
the e-pen including:
an erasure e-pen sensor electrode;
a first drive-sense circuit (DSC) operably coupled to the erasure e-pen sensor electrode, wherein, when enabled, the first DSC configured to:
drive an erasure e-pen signal having a first one or more characteristics via a first single line coupling to the erasure e-pen sensor electrode and simultaneously sense, via the first single line, change of the erasure e-pen signal, wherein based on interaction of the e-pen with the touch sensor device, the erasure e-pen signal is coupled into a touch sensor electrode of the touch sensor device; and
process the change of the erasure e-pen signal to generate a first digital signal that is representative of a first electrical characteristic of the erasure e-pen sensor electrode;

the touch sensor device including a second DSC operably coupled to the touch sensor electrode of the touch sensor device, wherein, when enabled, the second DSC configured to:
drive a touch sensor signal having a second one or more characteristics that are different than the first one or more characteristics via a second single line coupling to the touch sensor electrode of the touch sensor device and simultaneously sense, via the second single line, change of the touch sensor signal including sensing the erasure e-pen signal coupled from the erasure e-pen sensor electrode into the touch sensor electrode of the touch sensor device; and
process the change of the touch sensor signal to generate a second digital signal that is representative of a second electrical characteristic of the touch sensor electrode;

a memory that stores operational instructions; and
a processing module operably coupled to the second DSC and to the memory, wherein, when enabled, the processing module configured to execute the operational instructions to:
interpret the second digital signal to determine erasure operation of the e-pen; and
monitor for the e-pen based on coupling of one or more signals from the e-pen to the touch sensor device including coupling of the erasure e-pen sensor electrode into the touch sensor electrode of the touch sensor device.