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Recovering data in a near field communications apparatus

  • US 8,965,279 B2
  • Filed: 03/19/2010
  • Issued: 02/24/2015
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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1. A communications device, comprising:

  • a coupling connection configured to receive a communication signal from another communications device, the communication signal causing an output current at the coupling connection to fluctuate;

    a driver configured to adjust the output current to substantially compensate for the fluctuations of the output current to maintain a substantially constant voltage at the coupling connection;

    a demodulator configured to extract modulation from a supply current, the supply current providing operational power to the driver and fluctuating in a substantially similar manner as the output current; and

    a controller configured to control the driver to maintain the substantially constant voltage.

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