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Wireless power receiving device, receiver circuit thereof, and control method of wireless power receiving device

  • US 10,224,763 B2
  • Filed: 07/14/2015
  • Issued: 03/05/2019
  • Est. Priority Date: 07/17/2014
  • Status: Active Grant
First Claim
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1. A wireless power receiving device, comprising:

  • a receiving antenna;

    a rectifier circuit connected to the receiving antenna, that generates a rectified voltage;

    a charging circuit to receive the rectified voltage and charge a power storage device; and

    a modulator that modulates a voltage or current of the receiving antenna by changing a charging current of the charging circuit based on data to be transmitted to a wireless power transmitting device,wherein the charging circuit allows the charging current to be switched between a first current amount and a second current amount, andwherein the charging circuit includes;

    a first current source configured to continuously supply the first current amount to the power storage device during an operation time of the charging circuit; and

    a second current source configured to supply an additive current amount, which is a differential current between the first current amount and the second current amount, to the power storage device in an on-off manner according to the data.

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