System and method for reducing power dissipation for DSL circuits
AssigneeCatena Networks, Inc.
InventorKevin Golka
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Abstract
In accordance with an aspect of the present invention, there is provided a line card for providing data communication with a plurality of lines. The line card includes a plurality of modems and a plurality of switches. The modems determine a required headroom on each of the lines. Each of the switches selectively applies one of a plurality of available power supply voltages to a line driver on a corresponding one of the lines in accordance with the required headroom. A lowest voltage available that can maintain the required headroom is applied to each of the line drivers on a per-line basis for reducing power dissipation at the line card.
Claims8
A line card for providing data communication with a plurality of lines, said line card including:
- a plurality of line drivers coupled to said plurality of lines;
- a plurality of modems, coupled to said plurality of line drivers, for identifying a required headroom on each of said plurality of lines;
- and
- a plurality of switches, coupled to said plurality of modems, each for selectively applying one of a plurality of power supply voltages to a corresponding one of said plurality of line drivers associated with a corresponding one of said plurality of lines in accordance with said required headroom,
- wherein a lowest voltage available that can maintain said required headroom is applied to each of said plurality of line drivers on a per-line basis for reducing power dissipation at said line card.
Dependencies are inferred from the claim text.