Circuit for managing wireless power transmitting devices

Patent metadata

Field	Value
Publication number	US-10840743-B2
Application number	US-201916513607-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	Dec 12, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An example integrated circuit includes: (i) a processing subsystem configured to control operation of the integrated circuit, (ii) a waveform generator, operatively coupled to the processing subsystem, configured to generate radio frequency (RF) power transmission signals using an input current, (iii) a first digital interface that couples the integrated circuit with a plurality of power amplifiers that are external to the integrated circuit, and (iv) a second digital interface, distinct from the first digital interface, that couples the integrated circuit with a wireless communication component that is external to the integrated circuit. The processing subsystem is configured to: receive, via the second digital interface, an indication that a receiver is within transmission range of a transmitting device controlled by the circuit, and in response to receiving the indication: provide, via the first digital interface, the RF power transmission signals to at least one of the plurality of power amplifiers.

First claim

What is claimed is:

1. A circuit for managing operations of a wireless-power-transmitting device, the circuit comprising:
a processing subsystem;
a first interface to couple with an external power amplifier; and
a second interface to couple with an external communications radio,
wherein the processing subsystem is configured to:
receive, via the second interface, an indication that a wireless-power-receiving device seeks wireless charging, and
provide, via the first interface, one or more radio frequency (RF) signals to the external power amplifier, in response to receiving the indication, and

wherein the processing subsystem, the first interface, and the second interface are on a single integrated circuit, and further wherein the processing subsystem is not coupled to beamforming circuitry.

2. The circuit of claim 1 , wherein the first interface is only to couple with the external power amplifier.

3. The circuit of claim 1 , wherein:
the first interface is a first digital interface; and
the second interface is a second digital interface.

4. The circuit of claim 1 , wherein:
the processing subsystem further comprises a secure element; and
the secure element is configured to authenticate the wireless-power-receiving device based on a communication signal received by the external communications radio.

5. The circuit of claim 1 , wherein:
the external power amplifier is coupled to an antenna array of the wireless-power-transmitting device; and
at least one antenna of the antenna array is configured to radiate the one or more RF signals provided by the external power amplifier.

6. The circuit of claim 5 , further comprising a third interface to couple with the antenna array of the wireless-power-transmitting device,
wherein the third interface is configured to control operation of at least some antennas included in the antenna array, including the at least one antenna.

7. The circuit of claim 6 , further comprising a power detector configured to determine an amount of power reflected at the wireless-power-transmitting device while the at least one antenna radiates the one or more RF signals,
wherein the amount of power reflected is received through the third interface.

8. The circuit of claim 5 , wherein antennas of the antenna array are configured to transmit the one or more RF signals within a near-field distance of the wireless-power-transmitting device.

9. The circuit of claim 1 , wherein:
the external power amplifier is coupled to a single antenna of the wireless-power-transmitting device;
the single antenna is configured to radiate the one or more RF signals provided by the external power amplifier; and
the external power amplifier is only one external power amplifier.

10. The circuit of claim 1 , wherein:
the first interface is to couple with another external power amplifier; and
the processing subsystem is configured to provide, via the first interface, one or more additional RF signals to the other external power amplifier.

11. The circuit of claim 10 , wherein:
the other external power amplifier is coupled to an antenna array of the wireless-power-transmitting device; and
at least one antenna of the antenna array is configured to radiate the one or more additional RF signals provided by the other external power amplifier.

12. The circuit of claim 11 , further comprising a third interface to couple with the antenna array of the wireless-power-transmitting device,
wherein the third interface is configured to control operation of at least some antennas included in the antenna array.

13. The circuit of claim 10 , wherein:
the other external power amplifier is coupled to a single antenna of the wireless-power-transmitting device; and
the single antenna is configured to radiate the one or more additional RF signals provided by the other external power amplifier.

14. The circuit of claim 1 , further comprising, a waveform generator, coupled to the processing subsystem, configured to generate the one or more RF signals using an input signal.

15. The circuit of claim 14 , further comprising an RF oscillator and an RF converter,
wherein the waveform generator uses the RF oscillator and the RF converter to generate the one or more RF signals.

16. The circuit of claim 15 , wherein:
the RF oscillator is configured to generate the one or more RF signals at a desired frequency based on instructions from the processing subsystem; and
the RF converter is configured to convert, amplify, and/or modulate the one or more RF signals.

17. The circuit of claim 1 , further comprising a third interface, distinct from the first interface and the second interface, and configured to control operation of one or more external devices.

18. A wireless-power-transmitting device for transmitting wireless power to a wireless-power-receiving device, the wireless-power-transmitting device comprising:
at least one antenna for radiating one or more radio frequency (RF) signals; and
a circuit for managing operations of the wireless-power-transmitting device, the circuit comprising:
a processing subsystem;
a first interface to couple with an external power amplifier, the external power amplifier being coupled to the at least one antenna; and
a second interface to couple with an external communications radio,

wherein:
the processing subsystem is configured to:
receive, via the second interface, an indication that the wireless-power-receiving device seeks wireless charging, and
provide, via the first interface, the one or more RF signals to the external power amplifier, in response to receiving the indication, and

wherein the processing subsystem, the first interface, and the second interface are on a single integrated circuit, and further wherein the processing subsystem is not coupled to beamforming circuitry.

19. The circuit of claim 1 , wherein:
the external power amplifier is configured to provide the one or more RF signals to a power-transmission antenna that transmits RF energy to a wireless-power receiving device, and
the external communications radio has a data-communications antenna that is distinct from the power-transmission antenna.

20. The wireless-power-transmitting device of claim 18 , wherein the first interface is only to couple with the external power amplifier.

21. The wireless-power-transmitting device of claim 18 , wherein:
the first interface is a first digital interface; and
the second interface is a second digital interface.

22. The wireless-power-transmitting device of claim 18 , wherein:
the processing subsystem further comprises a secure element; and
the secure element is configured to authenticate the wireless-power-receiving device based on a communication signal received by the external communications radio.

23. The wireless-power-transmitting device of claim 18 , wherein the at least one antenna is configured to radiate the one or more RF signals provided to the external power amplifier by the processing subsystem.

24. The wireless-power-transmitting device of claim 23 , further comprising a third interface to couple with the at least one antenna of the wireless-power-transmitting device,
wherein the third interface is configured to control operation of at least some antennas included in the at least one antenna.

25. The wireless-power-transmitting device of claim 24 , further comprising a power detector configured to determine an amount

Assignees

• Energous Corp

Inventors

• Johnston Cesar
• Bosso Brian

Classifications

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title

• H02J7/70 Primary

  characterised by the mechanical construction · CPC title

• H02J50/20 Primary

  using microwaves or radio frequency waves · CPC title

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H02J50/23

  characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas · CPC title