Power transfer apparatus for concurrently transmitting data and power over data wires
First Claim
1. A method of transmitting both data signals and power supply current from a network device connectable to a transmission line, the method comprising:
- receiving electrical power at a power input of the network device; and
coupling a data signal between the network device and the transmission line via a coupling circuit, the coupling circuit comprising;
at least one inductor for coupling power supply current from the power input to the transmission line.
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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 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.
26 Citations
10 Claims
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1. A method of transmitting both data signals and power supply current from a network device connectable to a transmission line, the method comprising:
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receiving electrical power at a power input of the network device; and
coupling a data signal between the network device and the transmission line via a coupling circuit, the coupling circuit comprising;
at least one inductor for coupling power supply current from the power input to the transmission line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of transmitting both data signals and power supply current from a network device connectable to a transmission line, the method comprising:
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receiving electrical power; and
coupling a data signal between the network device and the transmission line via a coupling circuit, the coupling circuit also provides power supply current from the power input to the transmission line, the coupling circuit comprising;
two isolation transformers for coupling data between the network device and the transmission line, wherein the two isolation transformers each have a data input side and a transmission line side;
two center-tapped inductors for coupling power supply current to the transmission line, wherein each center-tapped inductor is connected across the transmission line side of a different one of the two isolation transformers; and
two capacitors, wherein each of the two capacitors is connected between partial windings on the transmission line side of a different one of the two isolation transformers.
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Specification