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NEAR FIELD RF COMMUNICATORS

  • US 20100291869A1
  • Filed: 11/14/2008
  • Published: 11/18/2010
  • Est. Priority Date: 11/15/2007
  • Status: Active Grant
First Claim
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1. A near field RF communicator having:

  • an inductive coupler to enable inductive coupling with a magnetic field of an RF signal;

    a rectifier to rectify an AC voltage derived from an RF signal inductively coupled to the inductive coupler; and

    a regulator to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler, the regulator having a voltage-controlled impedance and a regulator controller to provide a control voltage for the voltage controlled impedance and to vary the control voltage in dependence upon a current flowing through the voltage controlled impedance.

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