Improving Computer Scalability & Reliability to Enable Continued Technology Advancement

The Clock-Domain-Crossing Conundrum

– Jerry Cox The Clock-Domain-Crossing conundrum is this:  Where is the evidence of Clock-Domain-Crossing (CDC) failures that have occurred during a product’s service life? We know there have been products that have had CDC failures during test and been re-spun,...

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A Public Synchronizer

GET THE PUBLIC SYNCHRONIZER NOW You might ask yourself “Why would anyone want to have a public synchronizer available to download?” Usually designers just grab a flip-flop from his or her company’s or a standard cell vendor’s library. However, are these handy...

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Metastability References

S. Beer, R. Ginosar, J. Cox, T. Chaney, D. Zar “Metastability challenges for 65nm and beyond; simulation and measurements” Design, Automation & Test in Europe Conference & Exhibition (DATE), 2013 VIEW FULL ARTICLE S. Beer, R. Ginosar “Eleven ways to boost your...

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Measuring Metastability

Measuring metastability is just 50 years old this year. In 1965 my colleague Tom Chaney took a sampling ‘scope picture of an ECL flip-flop going metastable. S. Lubkin had made mention of the phenomenon over a decade before that, but at that time most engineers were...

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When is a Million-Year MTBF Too Short?

Jerry Cox The reliability metric, Mean Time Between Failures (MTBF), is often misunderstood. Use of an MTBF metric generally assumes a random failure process, one that is very infrequent and has no memory of past failures. Such failure modes can occur in...

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Synchronizer Reliability Metrics

Jerry Cox As an example of the need for real-world reliability metrics, consider a modern automobile. We can already buy a car with parking assistance, collision avoidance, autonomous braking and adaptive cruise control features. These new features depend on video...

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