PRU short beacon detection
First Claim
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1. A device for detecting a short beacon signal, the device comprising:
- a power-receiving unit (PRU) configured to receive the short beacon signal from one or more power-transmitting units (PTUs); and
a switch operable to assert an active load level for detection by the one or more PTUs in response to the short beacon signal,wherein the active load level, once asserted, makes a detectable change in a reflected impedance associated with of the PRU that is measurable by at least one of the one or more PTUs, and wherein the switch is configured to be turned ON by a first signal receivable from a rectifier circuit of the PRU.
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Abstract
A device for detecting a short beacon signal includes a power-receiving unit (PRU) to receive the short beacon signal from one or more power-transmitting units (PTUs). An active load level is asserted for detection by the one or more PTUs in response to the short beacon signal. The active load level, once asserted, makes a detectable change in a reflected impedance associated with the PRU as measured by at least one of the one or more PTUs.
5 Citations
20 Claims
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1. A device for detecting a short beacon signal, the device comprising:
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a power-receiving unit (PRU) configured to receive the short beacon signal from one or more power-transmitting units (PTUs); and a switch operable to assert an active load level for detection by the one or more PTUs in response to the short beacon signal, wherein the active load level, once asserted, makes a detectable change in a reflected impedance associated with of the PRU that is measurable by at least one of the one or more PTUs, and wherein the switch is configured to be turned ON by a first signal receivable from a rectifier circuit of the PRU. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of providing a device for detecting a short beacon signal, the method comprising:
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providing a power-receiving unit (PRU) that is configured to receive the short beacon signal from one or more power-transmitting units (PTUs); and providing a switch operable to assert an active load level for detection by the one or more PTUs in response to the short beacon signal, wherein the active load level is configured to cause, once asserted, a detectable change in a reflected impedance of the PRU that is measurable by at least one of the one or more PTUs, and wherein the switch is configured to be turned ON by a first signal receivable from a rectifier circuit of the PRU. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A system comprising:
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a power-transmitting unit (PTU) coupled to one or more transmit (TX) coils; a power receiving unit (PRU) configured to receive power via magnetic coupling to at least one of the one or more transmit (TX) coils; and a switch operable to assert an active load level in response to a short beacon signal received from the PTU, wherein the PTU is configured to detect a change in a reflected impedance associated with the PRU in response to the assertion of the active load level, and wherein the switch is configured to be turned ON by a first signal receivable from a rectifier circuit of the PRU.
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Specification