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Resonator circuit for a modulated power supply

  • US 9,582,128 B2
  • Filed: 12/23/2014
  • Issued: 02/28/2017
  • Est. Priority Date: 12/23/2014
  • Status: Active Grant
First Claim
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1. A processing system for a display device comprising an integrated capacitive sensing device, the processing system comprising:

  • a sensor module configured to be coupled to a plurality of sensor electrodes, each sensor electrode included in the plurality of sensor electrodes comprising at least one display electrode included in a plurality of display electrodes of the display device, wherein the sensor module drives the plurality of sensor electrodes for capacitive sensing during a first period;

    a display driver configured to drive display signals onto the display electrodes during a second period, wherein the display signals are based on a reference voltage, and the first period and the second period are at least partially overlapping; and

    a power supply configured to provide the reference voltage to the display driver, the power supply comprising a resonator circuit having an inductor connected in parallel with a capacitor, wherein the resonator circuit is configured to modulate the reference voltage.

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