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Handling of electromagnetic interference in an electronic apparatus

  • US 9,746,960 B2
  • Filed: 11/06/2014
  • Issued: 08/29/2017
  • Est. Priority Date: 11/06/2013
  • Status: Active Grant
First Claim
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1. A method operable in a touch-sensitive apparatus for measuring noise, wherein the touch-sensitive apparatus comprises a touch-sensitive module having a plurality of first electrodes and a plurality of second electrodes that intersect in multiple regions of the touch sensitive module, said method comprising the steps of:

  • disconnecting the first electrodes from a driving voltage source;

    acquiring a plurality of voltage values of noise by measuring a plurality of voltage signals associated with the second electrodes over a plurality of measurement cycles at a predetermined operating frequency during no driving voltage supplied to the first electrodes; and

    calculating respectively an evaluation of noise corresponding with each of designed measurement modes according to the acquired voltage values of noise, wherein each designed measurement mode corresponds to a combination of a plurality of forward operations and a plurality of reverse operations, and the number of the plurality of measurement cycles is M*N*K where N represents the number of the plurality of designed measurement modes, M represents the number of cycles to be performed for each mode, and K presents the number of measurement cycles taken for average.

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