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ACTIVE STYLUS

  • US 20150103049A1
  • Filed: 12/19/2014
  • Published: 04/16/2015
  • Est. Priority Date: 06/22/2011
  • Status: Active Grant
First Claim
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1. An active stylus, comprising:

  • an electrode at a tip of the stylus; and

    powered circuitry coupled to the electrode and configured for capacitively coupling the electrode with a capacitive touch sensor panel, the powered circuitry comprising;

    a clock to generate a drive voltage;

    a microcontroller connected to the clock and configured to control the drive voltage; and

    an amplifier connected to the microcontroller and configured to adjust the drive voltage and output the drive voltage at the electrode.

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