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Parasitic circuit for device protection

  • US 9,094,057 B2
  • Filed: 03/02/2011
  • Issued: 07/28/2015
  • Est. Priority Date: 08/25/2010
  • Status: Active Grant
First Claim
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1. A device for protecting circuitry, comprising:

  • a first circuit configured to receive a first transmitted signal from a first transmitter at an operational frequency; and

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

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