The analog computer is the standard good-old-PLL: if you have the 10KHz from a Jupiter than your analog filter will be simple to build. If you have only the PPS (or 100PPS from an Oncore) your analog filter will require more attention (and large capacitors) but I think it is realizable. You analog computer is the integrating filter out of the phase detector. The phase detector, made from JK flip-flops so quite digital, gives you an analog pulse whose length is be integrated to derive the EFC voltage for the OCXO. You are analog right out of the phase detector.
On Fri, Dec 30, 2011 at 3:35 AM, Chris Albertson <[email protected]>wrote: > > The era of cheap Thunderbolts appears to be history. > > > > What is the simplest GPSDO you can build? There are many designs > around but when the T-Bolts came out I think people lost interesting > building. > > I think something very simple could work. If your local oscillator is > at all decent it will not loose or gain full cycle in one second. So > I think you only need to compare the phase of the oscillator and the > PPS. Would an analog controller work? I do software all day every > day at work so it would be fun to build an analog computer for a > change. > > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > 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.
