Hi Hopefully the issue (and question) is about stability of the EFC voltage. Any decent OCXO should have a voltage stability that’s well below it’s temperature stability when run off of a fairly standard regulator. As an example, An OCXO that does 5x10^-9 over 0 to 70 C probably has a voltage stability below 5x10^-10 for a 1% change. One percent is more than what a modern regulator should be moving when running an OCXO.
Bob > On Dec 8, 2014, at 7:33 PM, Dave M <dgmin...@mediacombb.net> wrote: > > Dan Kemppainen wrote: >> Hi, >> >> In playing with some oscillators and a GPSDO here, I think I'm seeing >> a voltage sensitivity issue. >> >> So, I started looking at the output voltage of various regulators vs. >> temp. Using standard LM/UA type linear regulators and some LDO's, they >> all appear to be pretty sensitive to temperature. (millivolt / few >> degrees Fahrenheit sort of sensitivity). Most of the datasheets seem >> to ignore temp sensitivity. Almost like they are so bad they don't >> want to publish it... >> >> Does anyone have hints on TO-220 or D-Pak type regulators that have >> really good temp coefficients and good line regulation? A few PPM/Deg >> C might be nice, if possible. Or am I into a 'roll you own' type >> design... >> Dan >> > > > Yes, in order to get low PPM stability, you are going to "roll your own". No > 3-terminal regulator or reference that I know of can run an OXCO (heater and > oscillator). > What are your voltage and current requirements? > > Dave M > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.