Metastable States in Asynchronous Digital Systems: Avoidable or Unavoidable?1
نویسنده
چکیده
The synchronization of asynchronous signals can lead to metastable behavior and malfunction of digital circuits. It is believed but not proved that metastability principally cannot be avoided. Confusion exists about its practical importance. This paper shows that metastable behavior can be avoided by usage of quantum synchronizers in principle, but not in practice, and that conventional synchronizers unavoidably show metastable behavior in principle, but not in practice, if properly designed.
منابع مشابه
C-Element Metastability Mitigation using Schmitt-Trigger
As all state holding elements, Muller C-elements are prone to metastable upsets [1], [2], [3]. In case of an input spike or a short overlap of both input signals, a metastable state may arise in the element. The cause for the problem is that the storage loop starts to flip its state but while doing so, the input is removed and the loop is left in an undecided state. Based only on the characteri...
متن کاملAvoidable Mortality Differences between Rural and Urban Residents During 2004–2011: A Case Study in Iran
Background Avoidable mortality as an indicator for assessing the health system performance has caught the attention of researchers for a long time. In this study we aimed to compare the health system performance using this indicator in rural and urban areas of one of Iran’s southern provinces. Methods All deaths (29916) which happened during 2004–2011 in Bushehr province were assessed. Nolte ...
متن کاملPipeline Synchronization 1 Problem Speciication 2 Existing Solutions
Pipeline synchronization is a simple, low-cost, high-bandwidth, high-reliability solution to interfaces between synchronous and asynchronous systems, or between synchronous systems operating from diierent clocks. The technique can sustain maximum communication bandwidth while achieving an arbitrarily low, non-zero probability of synchronization failure, P f , with the price in both latency and ...
متن کاملDefining Avoidable and Unavoidable Complications in Spine Surgery: A Survey-based Study of Spine Fellowship Directors.
STUDY DESIGN A cross-sectional survey of orthopedic spine surgery fellowship directors in the United States. OBJECTIVE The aim of this study was to investigate whether consensus exists with respect to spine-related adverse events and certain hospital-acquired conditions (HACs) or "never events." SUMMARY OF BACKGROUND DATA As part of a broad effort to improve health care outcomes, providers ...
متن کاملReadmissions at a Public Safety Net Hospital
OBJECTIVE We aimed to determine factors related to avoidability of 30-day readmissions at our public, safety net hospital in the United States (US). METHODS We prospectively reviewed medical records of adult internal medicine patients with scheduled and unscheduled 30-day readmissions. We also interviewed patients if they were available. An independent panel used pre-specified, objective crit...
متن کامل