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ASYNC
2006
IEEE

Measuring Deep Metastability

14 years 6 months ago
Measuring Deep Metastability
Present measurement techniques do not allow synchronizer reliability to be measured in the region of most interest, that is, beyond the first half cycle of the synchronizer clock. We describe methods of extending the measurement range, in which the number of metastable events generated is increased by four orders of magnitude, and events with long metastable times are selected from the large number of more normal events. The relationship found between input times and the resulting output times is dependent on accurate measurement of input time distributions with deviations of less than 10ps. We show how the distribution of D to Clock times at the input can be characterised in the presence of noise, and how predictions of failure rates for long synchronizer times can be made. Anomalies such as the increased failure rates in a master slave synchronizer produced by the back edge of the clock are measured.
David Kinniment, Keith Heron, Gordon Russell
Added 10 Jun 2010
Updated 10 Jun 2010
Type Conference
Year 2006
Where ASYNC
Authors David Kinniment, Keith Heron, Gordon Russell
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