METHOD AND APPARATUS WITH NEGATIVE RESISTANCE IN WIRELESS POWER TRANSFERS

  • US 20090284082A1
  • Filed: 11/06/2008
  • Published: 11/19/2009
  • Est. Priority Date: 05/13/2008
  • Status: Active Grant
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First Claim
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1. A wireless power-receive circuit, comprising:

  • a receive antenna for coupling with a near field radiation at a resonant frequency;

    a capacitance element operably coupled in series with the receive antenna and comprising a capacitance value and an equivalent series resistance value;

    a negative resistance generator operably coupled in series with the capacitance element and comprising a negative resistance value; and

    a load operably coupled in series with the negative resistance generator and for drawing power from the near field radiation when the wireless power-receive circuit oscillates substantially near the resonant frequency.

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