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Dual-mode wireless power transfer apparatus

  • US 9,893,567 B2
  • Filed: 05/16/2016
  • Issued: 02/13/2018
  • Est. Priority Date: 08/03/2012
  • Status: Active Grant
First Claim
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1. A wireless power receiver, comprising:

  • a circuit, including;

    a coil circuit including a first coil to receive power wirelessly at a first resonant frequency;

    a second coil to receive a signal wirelessly at a second resonant frequency; and

    a passive network comprising a plurality of capacitors coupled to the first coil and the second coil, the plurality of capacitors comprising a first capacitor connected in series with the second coil, wherein the coil circuit is coupled in parallel with a series combination of the second coil and the first capacitor,wherein the circuit passively resonates at both the first resonant frequency and the second resonant frequency, the second resonant frequency being higher than the first resonant frequency, to wirelessly receive the power or the signal to provide to a rectifier electrically connected to the passive network.

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