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US 9,521,021 B2Granted
Adaptive backchannel equalization
AssigneeIntel Corporation
InventorsYun He, Sanjib Sarkar
Life of this patent
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Abstract
Techniques for adaptive backchannel equalization. A total equalization value is determined over a preselected training period. A total balance equalization value is determined over the preselected training period. A transmitter equalization coefficient is determined based on the total equalization value and the total balance equalization value. Data is transmitted over a serial link using the transmitter equalization coefficient.
Claims20
At least one non-transitory machine accessible storage medium having code stored thereon, the code when executed on a machine, causes the machine to:
- determine a continuous time linear equalizer (CTLE) peak setting of a receiver, wherein the receiver is coupled to a transmitter by a serial link;
- and
- transmit data over the serial link based on the transmitter equalization coefficient and the CTLE peak setting,
- wherein determining the continuous time linear equalizer (CTLE) peak setting comprises determining a continuous time linear equalizer (CTLE) peak value change by:
- increasing the CTLE peak value if a first decision feedback equalizer (DFE) tap exceeds a first preselected percentage of maximum capacity;
- and
- decreasing the CTLE peak value if a second DFE tap has an opposite magnitude as the first DFE tap and exceeds a second preselected percentage of the first DFE first tap magnitude.
4 more elements
A method comprising:
- determining a continuous time linear equalizer (CTLE) peak setting of a receiver, wherein the receiver is coupled to a transmitter by a serial link;
- and
- transmitting data over the serial link based on the transmitter equalization coefficient and the CTLE peak setting,
- wherein determining the continuous time linear equalizer (CTLE) peak setting comprises determining a continuous time linear equalizer (CTLE) peak value change by:
- increasing the CTLE peak value if a first decision feedback equalizer (DFE) tap exceeds a first preselected percentage of maximum capacity;
- and
- decreasing the CTLE peak value if a second DFE tap has an opposite magnitude as the first DFE tap and exceeds a second preselected percentage of the first DFE first tap magnitude.
4 more elements
An apparatus comprising:
- a feed forward equalizer module to:
- determine a continuous time linear equalizer (CTLE) peak setting of a receiver, by determining a continuous time linear equalizer (CTLE) peak value change, wherein determining the CTLE peak value change comprises:
- increasing the CTLE peak value if a first decision feedback equalizer (DFE) tap exceeds a first preselected percentage of maximum capacity;
- and
- decreasing the CTLE peak value if a second DFE tap has an opposite magnitude as the first DFE tap and exceeds a second preselected percentage of the first DFE first tap magnitude;
- and
- a link controller to cause data to be transmitted over a serial link based at least in part on the CTLE peak setting.
4 more elements
Dependencies are inferred from the claim text.