-------- In message <[email protected]>, Charles Steinmetz writes: >Perry wrote: > >>OK, but why? The temperature would be stable so the resistorsand >>reference diode wouldn't drift. > >There is a LOT more to making a good temperature-controlled >environment than hacking together a DIY oven. That may be fine for >stability of tenths of a percent (10e-3), but when stability of >10e-13 is at issue it doesn't pay to start with 50ppm parts and put >them in a DIY oven. You need to start with low-tempco parts.
I actually have some calculations relevant to this, I'll write them up on my homepage when I have a second. The short version is that voltage reference noise above 5PPM will be a limiting factor on performance. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.
