Step recovery diodes turn off fast but have a relatively long storage time. The fastest switched current integrators use schottky diodes.
On Tue, 7 Feb 2012 14:06:55 +0100, Azelio Boriani <[email protected]> wrote: >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 <[email protected]> wrote: > >> >> [email protected] 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. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
