Method and architecture for limiting input current to a broadband network power supply
AssigneeArris International, Inc.
InventorArthur T. Nemirow
Life of this patent
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Abstract
A power supply includes a control circuit that inhibits excessive input current draw during a low-line condition by decreasing a power supply output voltage in response to a measured change in either power supply input voltage or power supply input current. The power supply may be, for example, a cable television distribution network power supply that receives power from the coaxial cable that carries the television or other media signals or, in the case an optical fiber network, an auxiliary power cable associated with the fiber cable that carries the media signals.
Claims14
A method for power supply regulation, comprising:
- monitoring a parameter of input power in a power supply circuit, said parameter selected from the group consisting of input voltage and input current;
- measuring a change in said parameter;
- and
- decreasing an output voltage in said power supply circuit in response to said change in said parameter, whereby an input current in said power supply circuit is prevented from increasing.
A power supply circuit, comprising:
- a voltage regulation circuit receiving an input signal having an input voltage and an input current and providing an output signal having an output voltage and an output current;
- and
- a control circuit coupled to said voltage regulation circuit, said control circuit monitoring a parameter of input power, said parameter selected from the group consisting of said input voltage and said input current, said control circuit measuring a change in said parameter monitored, and decreasing said output voltage in response to said change in said parameter, whereby said input current is prevented from increasing.
Dependencies are inferred from the claim text.