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SENSOR AND METHOD OF SENSING

  • US 20100097077A1
  • Filed: 10/22/2009
  • Published: 04/22/2010
  • Est. Priority Date: 10/22/2008
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a plurality of charge measurement capacitors to couple to a plurality of channels of a touch sensor; and

    a controller configured to controltransferring charge to each of the plurality of channels,coupling each of the plurality of charge measurement capacitors to one of the plurality of channels such that charge is transferred to each of the plurality of charge measurement capacitors,discharging each of the plurality of charge measurement capacitors,determining an amount of charge present on each of the plurality of charge measurement capacitors; and

    identifying a change in capacitance of any one of the plurality of channels based on the amount of charge.

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