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NEAR FIELD COMMUNICATION DEVICES, SYSTEMS, AND METHODS USING Q FACTOR ADJUSTMENTS

  • US 20140256253A1
  • Filed: 03/06/2014
  • Published: 09/11/2014
  • Est. Priority Date: 03/07/2013
  • Status: Active Grant
First Claim
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1. An NFC (near field communication) device comprising:

  • a resonance unit configured to make data communication with an external device through an electromagnetic wave; and

    an NFC chip configured to provide output data to the resonance unit, to receive input data from the resonance unit, to reduce a Q factor (quality factor) of the resonance unit when a signal receive operation is performed in a card mode, and to maintain the Q factor of the resonance unit in a reader mode and when a signal transmit operation is performed in the card mode.

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