Power transfer apparatus for concurrently transmitting data and power over data wires
First Claim
1. A power-delivery circuit for delivering a combined power and data signal to a network device, the power delivery circuit comprising:
- a power-input port receiving a power supply signal;
a data-input port receiving a data signal;
a mixer circuit combining the power supply signal and the data signal to generate the combined power and data signal;
a data/power-output port communicating the combined power and data signal to the network device over a network data cable;
a data/power-input port receiving the combined power and data signal via the network cable; and
an isolation circuit electrically isolating the network device from the data-input, power-input and data/power-input ports in the event of a specific predefined voltage signal being applied to one of the power-input port, data-input and data/power input ports.
5 Assignments
0 Petitions
Accused Products
Abstract
Power supply current, sufficient to power a remote network device, is transmitted concurrently with a network data signal over a transmission line. A power-sourcing network device that can include a coupling circuit provides power and data to the remote network device. The coupling circuit can also be included in a stand-alone device. The remote network device (which can be a wireless access point) can separate the power signal from the data signal and use the power supply current to further process or retransmit the data signal. The power signal may be a low frequency relative to the frequency of the data signal, or it may be DC.
31 Citations
18 Claims
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1. A power-delivery circuit for delivering a combined power and data signal to a network device, the power delivery circuit comprising:
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a power-input port receiving a power supply signal; a data-input port receiving a data signal; a mixer circuit combining the power supply signal and the data signal to generate the combined power and data signal; a data/power-output port communicating the combined power and data signal to the network device over a network data cable; a data/power-input port receiving the combined power and data signal via the network cable; and an isolation circuit electrically isolating the network device from the data-input, power-input and data/power-input ports in the event of a specific predefined voltage signal being applied to one of the power-input port, data-input and data/power input ports. - View Dependent Claims (2, 3, 4)
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5. A power-delivery circuit for delivering a combined power and data signal to a network device, the power delivery circuit comprising:
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a power-input port receiving a power supply signal; a data-input port receiving a data signal; a mixer circuit combining the power supply signal and the data signal to generate the combined power and data signal; a data/power-output port communicating the combined power and data signal to the network device over a network data cable; a data/power-input port receiving the combined power and data signal via the network cable; a filter circuit separating the power signal and the data signal from the combined power and data signal; and a current-control circuit controlling a rate of change of a current of the power supply signal over time. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A power-delivery circuit for delivering a combined power and data signal to a network device, the power delivery circuit comprising:
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a power-input port receiving a power supply signal; a data-input port receiving a data signal; a mixer circuit combining the power supply signal and the data signal to generate the combined power and data signal; a data/power-output port communicating the combined power and data signal to the network device over a network data cable; a data/power-input port receiving the combined power and data signal via the network cable; and a current-balancing circuit equalizing current flow on at least one wire pair of the network cable. - View Dependent Claims (12, 13, 14)
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15. A method of delivering power to a network device over a network cable, the method comprising:
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providing a power supply signal; providing a data signal; combining the power supply signal and the data signal into a combined power and data signal; delivering the combined power and data signal to the network device over one or more pairs of wires in the network cable; reducing electromagnetic interference with the network device from the combined power and data signal; and equalizing current flow on at least one wire pair of the network cable. - View Dependent Claims (16, 17)
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18. A power-delivery circuit for delivering a combined power and data signal to a network device, the power delivery circuit comprising:
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a power-input port receiving a power supply signal; a data-input port receiving a data signal; a mixer circuit combining the power supply signal and the data signal to generate the combined power and data signal; a data/power-output port communicating the combined power and data signal to the network device over a network data cable; a data/power-input port receiving the combined power and data signal via the network cable; an isolation circuit electrically isolating the network device from the data-input, power-input and data/power-input ports in the event of a specific predefined voltage signal being applied to one of the power-input port, data-input and data/power input ports; a high-frequency suppression circuit reducing electromagnetic interference from the combined power and data signal with the network device; and a current-balancing circuit equalizing current flow on at least one wire pair of the network cable.
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Specification