Continuous-time decision feedback equalizer

Details Continuous-time decision feedback equalizer Continuous-time decision feedback equalizer

2005-04-21

2009-06-02

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S234000, C375S235000, C375S236000

Reexamination Certificate

active

07542508

ABSTRACT:
A continuous-time domain Decision Feedback Equalizer (DFE) for use in a serial communication channel comprises in one embodiment a summer, a decision circuit, a capture flip-flop (FF) and an N-th order active filter. The DFE and its active filter operate in continuous time to give improved performance over a discrete-time DFE. In one embodiment involving a first-order active filter, the capture FF is outside the continuous-time negative feedback loop of the DFE and involves a differential signal amplifier. In another embodiment, the capture flip-flop is inside the DFE loop, and in a third embodiment the decision circuit comprises a comparator.

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