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DC to AC power conversion using a wireless power receiver

  • US 10,797,506 B2
  • Filed: 04/05/2018
  • Issued: 10/06/2020
  • Est. Priority Date: 04/05/2018
  • Status: Active Grant
First Claim
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1. A wireless power receiver, comprising:

  • a resonant circuit comprising a power transfer receive element configured to wirelessly receive power via a magnetic field for providing power to a battery;

    a first switching circuit coupled to the resonant circuit between the power transfer receive element and the battery, the first switching circuit configured to act as an inverter and generate a first signal, based on an output from the battery in a discharging mode, at a resonant frequency of the resonant circuit, the first signal having an envelope at a first frequency; and

    a second switching circuit directly coupled to the resonant circuit between the power transfer receive element and the first switching circuit, wherein the resonant circuit is configured to, during the discharging mode of the battery, bias the second switching circuit at the resonant frequency in response to the first signal, wherein the second switching circuit is configured to perform rectification and is configured to extract the envelope to generate a second signal at half of the first frequency.

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