Frequency diverse e-pen for touch sensor and e-pen systems

A system including an electronic pen (e-pen) and a touch sensor device comprising:

• the e-pen including:
• an e-pen sensor electrode;
• a first drive-sense circuit (DSC) operably coupled to the e-pen sensor electrode, wherein, when enabled, the first DSC configured to:
• drive an e-pen signal having a first frequency via a first single line coupling to the e-pen sensor electrode and simultaneously sense, via the first single line, change of the e-pen signal, wherein based on interaction of the e-pen with the touch sensor device, the e-pen signal is coupled into a touch sensor electrode of the touch sensor device;
• and
• process the change of the e-pen signal to generate a first digital signal that is representative of a first electrical characteristic of the e-pen sensor electrode;
• and
• 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 frequency 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 e-pen signal coupled from the 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.