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Phase compensation for multi-stimulus controller

  • US 8,237,667 B2
  • Filed: 09/10/2008
  • Issued: 08/07/2012
  • Est. Priority Date: 09/10/2008
  • Status: Active Grant
First Claim
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1. A method comprising:

  • measuring individual phase delays of each drive line and sense line pair of a multi-stimulus sensing system, the multi-stimulus sensing system being a sensing system that scans, in a plurality of steps, drive lines with drive signals of different phases, each step including simultaneously stimulating a plurality of drive lines with a plurality of drive signals, the phases of the drive signals corresponding to a predetermined set of phases, the application of drive signals in each step generating a set of sense signals in the sense lines, each sense signal including a superposition of component signals that correspond to different drive lines paired with the sense line of the sense signal; and

    determining a set of compensated phases based on the individual phase delays and the predetermined set of phases, the plurality of sets of sense signals being decoded based on the set of compensated phases.

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