[time-nuts] crunching numbers from XOR phase detector

mike cook michael.cook at sfr.fr
Wed Jan 4 10:21:50 UTC 2012


Le 04/01/2012 09:58, Hal Murray a écrit :
> Neat.  Thanks for sharing.
>
> With a XOR, you can't tell which input is higher frequency.  I think you can
> fix that with a second XOR and a delay line.
>
> I think 90 degrees of delay will provide the most information.  At 10 MHz,
> that's 25 ns.  I think that's about 15 feet of good coax.
>
all that spaghetti made me wonder if you can get it on a chip . yes, it 
seems.  ex  EP8034, 200ns in tenths. there are others of course.






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