2.5 Gigabits-per-second transimpedance amplifier
AssigneeIntel Corporation
InventorTaesub Ty Yoon
Life of this patent
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Abstract
A transimpedance amplifier system includes a first gain stage to receive an input signal. A second gain stage is coupled to the first gain stage to provide a first output. A first passive feedback element is coupled in parallel with the second gain stage. A general feedback element is coupled in parallel with the first gain stage and the second gain stage. A replica biasing stage is included to provide a second output. A replica feedback element is coupled in parallel with the replica biasing stage.
Claims36
A transimpedance amplifier system, comprising:
- a first gain stage to receive an input signal;
- a second gain stage coupled to the first gain stage to provide a first output;
- a first passive feedback element coupled in parallel with the second gain stage;
- a general feedback element coupled in parallel with the first gain stage and the second gain stage;
- a replica biasing stage to provide a second output;
- and
- a replica feedback element coupled in parallel with the replica biasing stage.
A network interface, comprising:
- an optical receiver module having
- a transimpedance amplifier system to receive an input from a photo-detector, the transimpedance amplifier system including
- a first gain stage to receive an input signal,
- a second gain stage coupled to the first gain stage to provide a first output,
- a first passive feedback element coupled in parallel with the second gain stage,
- a general feedback element coupled in parallel with the first gain stage and the second gain stage,
- a replica biasing stage to provide a second output, and
- a replica feedback element coupled in parallel with the replica biasing stage, and
- a limiting amplifier to receive an output of the transimpedance amplifier;
- a recovery module to process an output of the limiting amplifier;
- and
- a media access control (“MAC”) module to analyze an output of the recovery module.
A method of converting a single-ended input signal into a differential output signal, comprising:
- passing the single-ended input signal through a first gain stage and a second gain stage;
- coupling a first passive feedback element in parallel with the second gain stage;
- coupling a general feedback element in parallel with the first gain stage and the second gain stage;
- coupling a replica feedback element in parallel with a replica biasing stage;
- providing a first output of the second gain stage;
- and
- providing a second output of the replica biasing stage.
Dependencies are inferred from the claim text.