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SINGLE-CHIP MULTI-STIMULUS SENSOR CONTROLLER

  • US 20120019467A1
  • Filed: 09/30/2011
  • Published: 01/26/2012
  • Est. Priority Date: 09/10/2008
  • Status: Active Grant
First Claim
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1. A controller for a multi-touch sensor, the controller formed on a single integrated circuit, comprising:

  • a transmit oscillator;

    a transmit signal section that generates a plurality of drive signals based on a frequency of the transmit oscillator;

    a plurality of transmit channels that transmit the drive signals simultaneously to drive the multi-touch sensor;

    a receive channel that receives a sense signal resulting from the driving of the multi-touch sensor;

    a receive oscillator; and

    a demodulation section that demodulates the received sense signal based on a frequency of the receive oscillator to obtain sensing results, the demodulation section including a demodulator and a vector operator.

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