Hi All, Thanks for the responses. I had a feeling the answer wouldn't be good, but was hoping someone would have a suggestion. There are currently a bunch of regulators in the 'system'. If there were some really good regulator out there, the shotgun approach would apply... Of course it is difficult to provide a good reference and pass transistor on the same die, but it was worth asking. Bert, The thought of temp control of the regulators crossed my mind. Not planning on going there unless I need to. But it was a thought, maybe if all else fails... Bob, > There are more modern parts with lower close in noise. Linear Technology has a number of them. Your filter caps take out the broadband stuff, close in is all that really matters. > Got any hints on which ones? Maybe a nice quiet regulator can be 'disciplined' with a better reference. Thanks, Dan

Hi All, Take a look on the low noise 1.5A LDO regulator LT1963 and 500 mA LT1763. Voltage regulation depend on how good is the circuit behaviour with respect to Noise, PSRR, Line regulation and Load regulation. For instance some LT regulators like LT1117, 1085 and 1086 have < 1% of Line and Load regulation but have worst noise specs than LT1963, LT1763, MCP1825, MCP1826. Regards, Vasco Soares ----- Original Message ----- From: "Dan Kemppainen" <dan@irtelemetrics.com> To: <time-nuts@febo.com> Sent: Tuesday, December 09, 2014 4:57 PM Subject: Re: [time-nuts] Linear voltage regulator hints... > Hi All, > > Thanks for the responses. I had a feeling the answer wouldn't be good, but > was hoping someone would have a suggestion. There are currently a bunch of > regulators in the 'system'. If there were some really good regulator out > there, the shotgun approach would apply... > > Of course it is difficult to provide a good reference and pass transistor > on the same die, but it was worth asking. > > > Bert, > > The thought of temp control of the regulators crossed my mind. Not > planning on going there unless I need to. But it was a thought, maybe if > all else fails... > > > Bob, > > > There are more modern parts with lower close in noise. Linear > Technology has a number of them. Your filter caps take out the broadband > stuff, close in is all that really matters. > > > > Got any hints on which ones? Maybe a nice quiet regulator can be > 'disciplined' with a better reference. > > Thanks, > Dan > > _______________________________________________ > 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.

Hi > On Dec 9, 2014, at 11:57 AM, Dan Kemppainen <dan@irtelemetrics.com> wrote: > > Hi All, > > Thanks for the responses. I had a feeling the answer wouldn't be good, but was hoping someone would have a suggestion. There are currently a bunch of regulators in the 'system'. If there were some really good regulator out there, the shotgun approach would apply... > > Of course it is difficult to provide a good reference and pass transistor on the same die, but it was worth asking. > > > Bert, > > The thought of temp control of the regulators crossed my mind. Not planning on going there unless I need to. But it was a thought, maybe if all else fails... > > > Bob, > > > There are more modern parts with lower close in noise. Linear Technology has a number of them. Your filter caps take out the broadband stuff, close in is all that really matters. > > > > Got any hints on which ones? Maybe a nice quiet regulator can be 'disciplined' with a better reference. http://www.linear.com/product/LTC6655 I believe that if you are trying to regulate the entire OCXO supply, you are doing the wrong thing and chasing the wrong problem …. Bob > > Thanks, > Dan > > _______________________________________________ > 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.