Synchronous rectifier design for wireless power receiver

  • US 9,859,797 B1
  • Filed: 12/29/2014
  • Issued: 01/02/2018
  • Est. Priority Date: 05/07/2014
  • Status: Active Grant
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First Claim
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1. A receiver comprising:

  • an antenna configured to receive power transmission waves; and

    a synchronous rectifier coupled to the antenna and configured to synchronously rectify an alternating current (AC) voltage of the power transmission waves to generate a direct current (DC) voltage, wherein the synchronous rectifier includes;

    a first rectifying diode that includes a first anode terminal and a first cathode terminal, wherein the first rectifying diode is configured to receive a first portion of the AC voltage that has a positive polarity;

    a second rectifying diode that includes a second anode terminal and a second cathode terminal, wherein the second rectifying diode is configured to receive a second portion of the AC voltage that has a negative polarity;

    a first transistor that includes a first source terminal, a first drain terminal, and a first gate terminal, wherein the first anode and the first cathode terminals are connected to the first transistor;

    a second transistor that includes a second source terminal, a second drain terminal, and a second gate terminal, wherein the second anode and the second cathode terminals are connected to the second transistor; and

    circuitry that is configured to introduce a timing delay between driving the first and second transistors;

    a first boost converter in electrical communication with the synchronous rectifier, the first boost converter configured to match an impedance of a load associated with the receiver.

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