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US 8,264,253 B2Granted
Transmitter swing control circuit and method
AssigneeIntel Corporation
InventorsKathy Tian, Harry Muljono
Life of this patent
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Abstract
Disclosed herein are embodiments of a swing compensation scheme for compensating errors in a transmitter driver.
Claims14
A chip comprising:
- a differential transmitter driver to provide a differential output, the differential output having a first output signal and a second output signal, wherein the first output signal has a first output direction swing level, and wherein the second output signal has a second output direction swing level;
- and
- a swing control circuit coupled to the differential transmitter driver to compensate the differential transmitter driver based on both the first and second output direction swing levels,
- wherein the swing control circuit comprises:
- a first amplifier to receive the first and second output signals at positive and negative terminals respectively of the first amplifier and to output a first signal with a first direction;
- and
- a second amplifier to receive the first and second output signals and output a second signal with a second direction different from the first direction.
4 more elements
A chip comprising
- a differential transmitter driver, having a current source to control the strength of the differential transmitter driver, and a differential output with a first termination resistor coupled to a first output node and a second termination resistor coupled to a second output node;
- and
- a swing compensation circuit coupled to the current source and first and second output nodes to control the current source based on a voltage difference between the first and second output nodes when the first node voltage is different than the second node voltage,
- wherein the swing control circuit comprises:
- a first amplifier, with inputs coupled to the first and second output nodes at positive and negative terminals respectively of the first amplifier, to output a first signal with a first direction;
- and
- a second amplifier, with inputs coupled to the first and second output nodes, to output a second signal with a second direction different from the first direction.
4 more elements
Dependencies are inferred from the claim text.