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Near field RF communicators having refined energy sharing characterisitics utilizing improved shunt current control

  • US 8,588,682 B2
  • Filed: 11/14/2008
  • Issued: 11/19/2013
  • Est. Priority Date: 11/15/2007
  • Status: Active Grant
First Claim
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1. A near field communications (NFC) device, comprising:

  • a rectifier configured to rectify an induced power to provide a rectified power;

    a voltage-controlled impedance configured to adjust an induced current flowing through the voltage-controlled impedance, in response to a control signal, to regulate the rectified power;

    a regulator controller configured to provide the control signal based on a feedback signal; and

    a feedback device configured to multiply the control signal by a reference voltage to generate the feedback signal.

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