Thats a great question and not to distract the thread. The modern references seem far superior to the old ones that might be as simple as a zener diode. However the internal references are almost always in a semi temperature controlled environment near the oven. Kind of interesting trade offs. Regards Paul WB8TSL
On Fri, Apr 19, 2013 at 10:40 AM, Poul-Henning Kamp <[email protected]>wrote: > In message <[email protected]>, Herbert Poetzl > writes: > >On Fri, Apr 19, 2013 at 09:20:05AM -0400, [email protected] wrote: > > >Texas Instruments has a number of precision DACs for a > >very reasonable price, for example the DAC1220 (20bit > >low power delta-sigma, ~8 USD) and precision voltage > >references to go with (e.g. REF5050, ~2 USD). > > That reminds me of another thing: I wonder if one is better off > using a external precision reference or the VREF output from the > OCXO ? > > It's probably one of those "sometimes" things... > > > -- > 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. > _______________________________________________ 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.
