[time-nuts] Gate propagation delay jitter

Dr Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Apr 10 17:27:32 EDT 2007


Enrico Rubiola wrote:
> My friends, if you worry about jitter there is a trick:
> synchronize the signat to the clock with a D-type flip flop,
> just at the output.
> Maybe too trivial for you.
> E.
>
>
> Enrico Rubiola
> professor of electronics
>
> web:	http://rubiola.org
> e-mail:	rubiola at femto-st.fr
>
> FEMTO-ST Institute
> 32 av. de l'Observatoire
> 25044 Besancon, FRANCE
> voice:	+33(0)381.853940 (E.Rubiola)
> voice:	+33(0)381.853999 (switchboard)
> fax:		+33(0)381.853998
>
>
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>   
Enrico

Then we would need to know/measure the jitter of the retiming flipflop.
There appears to be little definitive published data on the jitter of 
various logic gates and flipflops.
Consequently a simple reliable method of measuring such jitter would be 
useful.

Bruce




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