Re: [SI-LIST] : Catching the Corners: chain of synchronizingregisters

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From: D. C. Sessions (dc.sessions@vlsi.com)
Date: Mon Mar 20 2000 - 08:16:24 PST


"S. Weir" wrote:
>
> Shayle,
>
> The best that we can do is to reduce the probability that a metastable
> condition will propagate. The generally accepted metastability equation is
> based on observations conducted with a two stage shift register circuit.
>
> MTBF_2stage = ( e^( -k1 )) / ( k2*Fclk*Fstim )
>
> k1 = metastable resolution constant
> k2 = metastable susceptability window
> Fclk = sampling clock frequency
> Fstim = Asynchronous input stimulus frequency

This doesn't look right. The MTBF should be exponential with Fclk,
not hyperbolic.

-- 
D. C. Sessions
dc.sessions@vlsi.com

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