Current mode line driver
AssigneeRalink Techonology Corp.
InventorHsin-Hsien Li
Life of this patent
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Abstract
The present invention discloses a line driver for a communication system with a variable loading. The line driver includes a positive output terminal, a negative output terminal, a plurality of current cells, for generating a plurality of output currents, and a plurality of switches, for controlling a number of connections between the plurality of current cells and the positive output terminal and the negative output terminal according to impedance of the variable loading, to generate a total output current such that a output voltage swing stays within a specific range.
Claims7
A current mode transmission line driver for a communication system with a variable loading, the current mode transmission line driver comprising:
- a positive output terminal;
- a negative output terminal;
- a plurality of current cells, for generating a plurality of output currents;
- and
- a plurality of switches, coupled between the plurality of current cells and the positive output terminal and the negative output terminal, respectively, for controlling a number of connections between the plurality of current cells and the positive output terminal and the negative output terminal according to impedance of the variable loading, to sum and generate a total output current such that an output voltage swing stay within a specific range.
Dependencies are inferred from the claim text.