[time-nuts] PICTIC II questions

Azelio Boriani azelio.boriani at screen.it
Tue Feb 7 13:06:55 UTC 2012

To enhance the PICTIC II performance can step recovery diodes be used?
Maybe the fast turn off can boost the switching capabilities of the
interpolator for best resolution...

On Tue, Feb 7, 2012 at 12:35 PM, Hal Murray <hmurray at megapathdsl.net> wrote:

> attila at kinali.ch said:
> > BTW: does anyone know how these days low cost FPGAs perform in terms of
> > jitter? (the data sheets are kind of scarce in that regard). And how do
> they
> > compare to state of the art ECL logic?
> Generally, not good.
> The general problem is that they have a lot of logic and a lot of I/O
> drivers
> and shared power/ground pins.  Things are messy if you have multiple
> clocks.
> Things are better if you only have one clock and better if you don't have
> any
> nearby drivers switching at the same time.
> For a few critical signals, you could reclock in an external FF.
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
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