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Frequency selection with two frequency sets of multiple operating frequencies in a mutual capacitance sensing devices

  • US 9,209,802 B1
  • Filed: 09/27/2012
  • Issued: 12/08/2015
  • Est. Priority Date: 02/24/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • monitoring a signal on a plurality of electrodes of a sense network, the sense network to operate in a first frequency set or a second frequency set, each comprising a plurality of operating frequencies;

    determining a first group of one or more noise metrics of noise in the signal;

    determining a second group of one or more noise metrics of the noise in the signal;

    performing a frequency hop within the first frequency set based on the first group of one or more noise metrics, wherein the frequency hop switches from a first operating frequency to a second operating frequency within the first frequency set; and

    performing a frequency set hop from the first frequency set to the second frequency set based on the second group of one or more noise metrics, wherein the frequency set hop switches from the first operating frequency in the first frequency set to an operating frequency in the second frequency set.

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