Hi
> On Jul 9, 2017, at 9:35 AM, Francesco Messineo <[email protected]> > wrote: > > On Sun, Jul 9, 2017 at 2:15 AM, Mark Sims <[email protected]> wrote: > >> >> So far my design is tending towards: 10MHz ref input -> Minicircuits >> doubler -> Wenzel squarer -> 74AC74 divider -> 74AC04 buffer -> level >> shifter. The doubler/divider might not be needed, but I think it will give >> a more symmetric output. I might include a space for a 10 MHz TTL >> oscillator for non time-nut users... hopefully it might be stable enough >> over the short time interval for a cal measurement cycle. > > > once upon a time, I was experimenting with digital signals to derive > stable RF transverter > LOs. I've "found" that feeding a XOR gate with a signal and his > replica delayed by 2 inverters > did result in a crude frequency doubler (well it's rather an edge > detector). You can do the same thing with a filter on one input of the XOR. Tuning the filter for best symmetry is fairly easy. Watching the result on a spectrum analyzer usually is quickest. Bob > Since I was going to use the double frequency just to drive > a divider by two, the actual duty cycle out of the doubler didn't > matter. > > HTH > Frank > _______________________________________________ > 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.
