Integrated rectifier and boost converter for wireless power transmission

  • US 9,806,564 B2
  • Filed: 05/07/2014
  • Issued: 10/31/2017
  • Est. Priority Date: 05/07/2014
  • Status: Active Grant
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First Claim
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1. A receiver for providing power to a load, comprising:

  • a plurality of rectifiers, each connected to a common node and to a respective one of a plurality of antennas, wherein each antenna of the plurality of antennas is configured to convert electromagnetic energy from radio-frequency (RF) waves transmitted by a remote transmitter into alternating current (AC) voltage, and wherein each of the plurality of rectifiers is configured to;

    convert the AC voltage received from one of the plurality of antennas to a direct current (DC) voltage; and

    provide the DC voltage to the common node, wherein a first DC voltage is provided at the common node; and

    a boost converter for increasing the first DC voltage to a second DC voltage, the boost converter comprising;

    (i) an inductor operatively coupled to the common node and configured for receiving the first DC voltage and for providing the second DC voltage to an output terminal of the boost converter;

    (ii) a microcontroller configured for controlling an amount of increase in voltage, provided from the inductor to the output terminal, from the first DC voltage to the second DC voltage; and

    (iii) a comparator operatively coupled to the microcontroller and the common node, the comparator configured for comparing the first DC voltage provided at the common node with a reference voltage generated at the microcontroller,wherein the microcontroller controls the amount of increase in voltage based on a comparison of the first DC voltage with the reference voltage performed by the comparator.

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