[time-nuts] Gate propagation delay jitter
rubiola at femto-st.fr
Tue Apr 10 18:14:01 EDT 2007
> Then we would need to know/measure the jitter of the retiming
microwave: -120 dBrad^2/Hz flicker, -150 dB white
RF: -140 dBrad^2/Hz flicker, -150 dB white
Use a double balanced mixer, traditional configuration.
A correlation scheme is probably not necessary.
On the understanding side, aliasing is the beast to kill.
A logic gate shows a gain g<>0 (analog gain!!!) during the
edges, for it behaves as a sampling system -> increased
noise bandwidth, due to aliasing.
William Egan wrote an illuminating article, Transact. UFFC
(1990 in my notebooks, 1992 in my memory, sorry)
> There appears to be little definitive published data on the jitter of
> various logic gates and flipflops.
I know. Fred L. Walls did some work, proc. Freq. Control Symp,
I don't remember when.
> Consequently a simple reliable method of measuring such jitter
> would be
Whoever has data, please send.
professor of electronics
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