On 7/22/2016 10:15 AM, David wrote:
It is too bad voltage control of an oscillator cannot be made ratiometric. Or can it? I have never heard of such a thing. That would remove some of the demands on a low drift reference.
That's what we tried to do with the E1938A. A multiplying DAC is used based on a reference that is ovenized instead the crystal oven. That certainly eliminated the tempco issue with the reference, but then we discovered 1/f noise on the reference. We had to redesign with a different reference. Rick _______________________________________________ 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.
