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US 2022/0191069 A1Published application
Multi pulse amplitude modulation signaling decision feedback equalizer having power differentiating modes and tap-weight re-configuration
AssigneeIntel Corporation
InventorsYikui Dong, Shenggao Li
Life of this patent
Estimating the term…
Abstract
Some embodiments include apparatus having multiple samplers in a decision feedback equalizer (DFE). The multiple samplers include at least two samplers and are configured to be activated in a first mode of the DFE to receive first input information from a summing circuit. At least one of the samplers is configured to be deactivated in a second mode of the DFE. At least one of the samplers is configured to be activated in the second mode of the DFE to receive second input information from the summing circuit.
Claims25
An apparatus comprising:
- multiple samplers in a decision feedback equalizer (DFE), the multiple samplers including at least two samplers, the multiple samplers configured to be activated in a first mode of the DFE to receive first input information from a summing circuit in the first mode of the DFE or at least one sampler of the multiple samplers configured to be deactivated in a second mode of the DFE;
- and
- a selected sampler among the multiple samplers configured to be activated in the second mode of the DFE to receive second input information from the summing circuit.
An apparatus comprising:
- a summing circuit;
- a first sampler in a decision feedback equalizer (DFE) coupled to the summing circuit, the first sampler configured to be deactivated in a mode of the DFE;
- a second sampler in the DFE coupled to the summing circuit, the second sampler configured to be activated in the mode of the DFE to receive input information from the summing circuit;
- and
- a third sampler in the DFE coupled to the summing circuit, the third sampler configured to be deactivated in the mode of the DFE.
2 more elements
An apparatus comprising:
- conductive lines on a circuit board;
- a first device including a transmitter coupled to the conductive lines;
- and
- a second device including a receiver coupled to the conductive lines to receive an input signal from the conductive lines, the receiver including:
- a first sampler in a decision feedback equalizer (DFE) configured to be activated in a 4-level pulse-amplitude modulation (PAM4) mode, or configured to be deactivated in a non-return-to-zero (NRZ) mode of the DFE;
- a second sampler in the DFE configured to be activated in the PAM4 mode of the DFE to receive first input information from a summing circuit, or configured to be activated in the NRZ mode of the DFE to receive second input information from the summing circuit;
- and
- a third sampler in the DFE configured to be activated in the PAM4 mode of the DFE to receive the first input information from the summing circuit, or configured to be deactivated in the NRZ mode of the DFE.
5 more elements
Dependencies are inferred from the claim text.