The use of Optimization in Signal Integrity Performance Centric High Speed Digital Design Flow - April 23, 2009 - European IBIS Summit

Oct 25, 2026

Optimization applied within a signal integrity, performance-centric high-speed digital design flow is addressed through an end-to-end, eye-diagram-driven approach. The material contrasts current channel-oriented design-flow gaps with an eye-centric workflow that improves channel design time, increases robustness toward end-to-end channel performance, and reduces marginal-design risk. Core eye-diagram concepts are covered, including key measurements, statistical delay and jitter effects, eye binning, histogram-based analysis, delay calculation requirements for automation, and automated eye crossing detection using histogram means.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages26

Reading Time1 h 6 min

AccessFree to download

Agenda

Channel Complexity and Gaps in Current Design Flow

Advantage of End to End Eye Centric Design Flow

Why an Eye Diagram?

Eye Diagram Measurements

Optimization of DDR2 Channel.

Advantage of Eye Centric Design Flow

Channel Design Time Gain

End to End Robustness

Risk Reduction

Eye Diagram

Why Eye Diagram is Important

Characterizing an Eye Diagram

Most Common Eye Diagram Measurements

Slice and Dice

Eye Binning

Histogram Plots and Binning Data

Eye Delay

Why delay calculation is required

Calculated Delay

Automated Eye Crossing Detection

The use of Optimization in Signal Integrity Performance Centric High Speed Digital Design Flow April 23, 2009 European IBIS Summit, Nice France Saliou Dieye, Agilent Technologies, EEsof EDA Product Line EMEA Market Development Manager Brahim Bensalem, Intel Corporation Lihua Wang, Agilent Technologies, EEsof EDA Sanjeev Gupta, Agilent Technologies, EEsof EDA Page 1 Agilent Technologies-EEsof EDA Agenda • Channel Complexity and Gaps in Current Design Flow • Advantage of End to End Eye Centric Design Flow • Why an Eye Diagram ? • Eye Diagram Measurements • Optimization of DDR2 Channel. Page 2 Agilent Technologies-EEsof EDA Advantage of Eye Centric Design Flow • Substantial gain in Channel Design Time (More than 3 weeks in our DDR2 case) • Design is more robust since channel is optimized toward end to end channel performance • Reduces risk of marginal design or opportunity loss due to over design Page 4 Agilent Technologies-EEsof EDA Eye Diagram Why Eye Diagram is Important? Page 5 Agilent Technologies-EEsof EDA Characterizing an Eye Diagram Most commonly used eye diagram measurements • Eye level 1 & level 0 • Eye rise/ fall time • Eye opening • Eye width • Eye height • Eye amplitude • Peak to peak & RMS jitter Delay Effect Most of the measurements are statistical in nature Page 6 Agilent Technologies-EEsof EDA Slice and Dice Eye Binning Eye Diagram Binning Data Page 7 Agilent Technologies-EEsof EDA Histogram Plots Histogram can be created for any portion of eye diagram Histogram across timing axis provide peak to peak jitter Histogram across amplitude axis provide distribution around level one and zero Page 8 Agilent Technologies-EEsof EDA Eye Delay Why delay calculation is required • Delay calculation is required for automated eye parameter measurements • Binning the eye diagram makes this calculation easy Calculated Delay Page 9 Agilent Technologies-EEsof EDA Automated Eye Crossing Detection • Mean value of horizontal histogram provide crossing time value • Mean value of amplitude histogram provides crossing amplitude value Page 10 Agilent Technologies-EEsof EDA

FAQs

What are the main gaps in the current design flow discussed in the agenda?

The agenda highlights channel complexity and gaps in the current design flow as the motivation for changing the approach.

Why is an eye diagram important in this design flow?

An eye diagram is used to evaluate and characterize channel behavior; the deck explains its importance and then details common eye-diagram measurements.

How does eye binning support automated eye parameter measurements?

Eye delay calculation is required for automated eye parameter measurements, and the deck states that binning the eye diagram makes this calculation easier.

Oct 25, 2026

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