Continuous power transfer scheme for two-wire serial link
First Claim
1. A method for transferring power from a system-side circuit to a line-side circuit connected via a transmission medium, the method comprising:
- receiving, at the system-side circuit, a first signal imposed on the transmission medium by the line-side circuit;
transferring power from the system-side circuit to the line-side circuit via the transmission medium by reinforcing the first signal at the system-side circuit;
wherein the step of reinforcing comprises the steps of;
amplifying the first signal to produce a first amplified signal; and
adding the first amplified signal to the first signal.
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Accused Products
Abstract
The invention provides a single digital communication link between system-side and line-side circuitry in a DAA, capable both of carrying data signals and of transferring a substantial amount of power to the line-side circuitry. The invention comprises a system-side interface circuit, a line-side interface circuit, and an isolation barrier including a transformer. Each interface circuit is capable of connection to an upstream communication circuit (either line-side or system-side), from which it may receive data signals to be transmitted across the isolation barrier to the other interface circuit, and to which it may pass data signals received across the isolation barrier from the other interface circuit. The line-side interface circuit may further include a rectifier and a storage device.
40 Citations
12 Claims
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1. A method for transferring power from a system-side circuit to a line-side circuit connected via a transmission medium, the method comprising:
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receiving, at the system-side circuit, a first signal imposed on the transmission medium by the line-side circuit; transferring power from the system-side circuit to the line-side circuit via the transmission medium by reinforcing the first signal at the system-side circuit; wherein the step of reinforcing comprises the steps of; amplifying the first signal to produce a first amplified signal; and
adding the first amplified signal to the first signal. - View Dependent Claims (2, 3)
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4. A system-side circuit for transferring power to a line-side circuit across a transmission medium, comprising:
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an interface circuit adapted to (i) receive a first receive signal imposed on the transmission medium by the line-side circuit and (ii) transfer power to the line-side circuit via the transmission medium by reinforcing the first receive signal; wherein the interface circuit is adapted to reinforce the first receive signal by amplifying the first receive signal to produce a first amplified signal; and
adding the first amplified signal to the first receive signal. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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Specification