Hal Murray wrote: >> For digital circuits, it would seem that the potential for >> metastability & threshold uncertainty, is reduced when the >> slope-to-noise ratio is optimized. I wonder if this concept is, or can >> be quantified? >> > > I don't think noise hurts or helps metastability. For every case where it > might hurt there is the mirror image where it helps. > > > I would expect a slower rise time to cause more metastability. Here is the > way I think about it. If you have N ns to settle, there is a window in > voltage that is Y mV wide. (give or take some statistics) The signal with > the faster rise time will spend less time inside that window. > > There is probably some limit where making it faster doesn't help any more. > > > Speaking of rise time... > > I'm somewhat looking for a signal generator - digital rather than sine wave. > > I'm pretty sure I used an HP box 10-20 years ago that had knobs on the rise > and fall times as well as frequency and whatever. Is there some obvious unit > is should be looking for? Do they show up on eBay? ... > > > > Perhaps an HP8082A, but it all depends on what range of risetimes etc you need.
There's one currently listed on ebay. Bruce _______________________________________________ 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.
