Decision feedback equalizer (DFE) for jitter reduction

Details Decision feedback equalizer (DFE) for jitter reduction Decision feedback equalizer (DFE) for jitter reduction

2007-07-10

2007-07-10

Bocure, Tesfladet (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

Reexamination Certificate

active

11074966

ABSTRACT:
A decision feedback equalizer (DFE) for a receiver that can reduce jitter is disclosed. The DFE uses an equalizer structure that employs a symbol sampling operation at a decision device, also known as a slicer. In a receiver, the phase of a signal, such as an equalized signal, is typically estimated from zero crossings in the clock recovery operation. Fluctuations in these zero crossings makes phase of the reproduced clock unstable, which decreases error performance in an associated receiver. Embodiments advantageously align inter-symbol interference (ISI) canceling terms from a feedback filter (FBF) relatively well, and thereby provide equalization of a relatively large portion of a symbol period. This advantageously stabilizes the phase of an equalized signal and reduces jitter.

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