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PARASITIC CIRCUIT FOR DEVICE PROTECTION

  • US 20150334884A1
  • Filed: 07/27/2015
  • Published: 11/19/2015
  • Est. Priority Date: 08/25/2010
  • Status: Active Grant
First Claim
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1. A device for providing protection from wireless power, comprising:

  • a first circuit configured to wirelessly receive power via a first magnetic field at an operational frequency from a transmitter to power or charge a load; and

    a second circuit configured to generate an opposing magnetic field that opposes at least a portion of the first magnetic field at the operational frequency, wherein the second circuit is configured to exhibit a first impedance in response to the operational frequency and exhibit a second impedance in response to a different frequency from the operational frequency.

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