two D-flops in series make a synchronizer!? (see the input-channels on Nutt-type time interval counters) http://chipdesignmag.com/print.php?articleId=32?issueId=5 you've lost all your noise - but you've also got rid of all the signal - so not great for improving SNR.
On Tue, Oct 14, 2014 at 6:32 PM, Simon Marsh <subscripti...@burble.com> wrote: > > I now have the 2 D-flops in a 74AC74 wired in series so that one does the > sampling and the other acts as a shift register before the output is sent > on to the BBB. > I got so far with this before realising that one of the D-flops was being > much more noisy than the other and indeed it was only a single output that > was particularly noisy. Switching to the inverted output reduced the noise > considerably. > After a bit of head scratching I swapped the part with the result that > _all_ the glitches vanished. Completely. Even at small beat frequencies > (<5hz). > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
