Hi > On Feb 28, 2020, at 9:33 AM, jimlux <jim...@earthlink.net> wrote: > > On 2/28/20 2:34 AM, Attila Kinali wrote: >> On Thu, 27 Feb 2020 08:45:16 -0800 >> "Richard (Rick) Karlquist" <rich...@karlquist.com> wrote: >>> OTOH, you could build a simple Colpitts >>> oscillator and see where it oscillates. >>> That's what they did back in the dark >>> ages. >>> >>> Any time nut should be up for that. >> Yes, but how many of us can build a time-nuts quality oscillator? >> I'm still lacking that paper/book that teaches me how to build >> a high stability oscillator. > > > I think to a large extent that is more art than science. High performance > electronics (low noise, high stability, mass production, you name it) is > always a combination of tradeoffs of non-ideal behavior, much of which is not > necessarily modelable in a systems sense. So the trades get made by "gut > feel" developed from experience.
There are papers that dive into some of the tradeoffs. Things like phase noise get a lot of attention. However, every attempt that I’m aware of to write an “oscillator cookbook” has either become very narrow ( = how to use this chip in a clock oscillator) or has hit a wall before becoming useful. The normal way high precision oscillators are “learned" is to either learn it from the guy on the next bench (who already knows) or to do a whole lot of experimentation. Even there, the process is pretty narrowly focused. Bob > > Driving along that path a bit further, the really fundamental improvements > come when someone figures out how to get better performance without needing > art and skill. Movable type brought the written word to everyone. Offset > printing brought high quality image reproduction to the masses. Silicon > lithography brought computation to all of us. > > >> I have a couple of 5MHz 3rd OT SC cut crystals in HC-37 case sitting >> in a box, waiting to be used as some oscillator, I just lack the knowledge >> to make good use of them. > > Experiment. Build a fet or MMIC oscillator and see how it works. > >> Attila Kinali > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
