Report on Failure Resistant Interconnect Circuit with Time Based Decision Feedback Equalizer

  • Authors:
    Chris H. Kim (Univ. of Minnesota)
    Publication ID:
    Publication Type:
    Deliverable Report
    Received Date:
    Last Edit Date:
    2409.001 (University of Minnesota)


On-chip serial links are attractive for high-speed point-to-point applications as they can achieve 10Gb/s or higher data rates without using power-hungry and floorplan-disrupting repeaters. Decision feedback equalization (DFE) has now become indispensable for improving the performance of off-chip links, however they have not been adopted widely in on-chip links due to the large power consumed by the current mode logic (CML) circuits required for high-speed operation. In an effort to make DFE more digital-friendly and amenable to technology scaling, we propose a time-based DFE technique where the weighted sum filter operation is performed entirely in the time domain. Our digital intensive approach utilizes inverters and digitally- controlled delay elements that can be readily designed in advanced technologies.

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