[time-nuts] GPS lock of the FE5680. Current experiment and question

[David]

On Fri, 10 Feb 2012 19:54:11 -0600, David <davidwhess at gmail.com>
wrote:

>Flip-flops hardened against metastability are available.
>
>I would try a track and hold before a sample and hold but I wonder how
>accurate it would be having to rely on the oscillator waveform.  Fast
>sample gates are non-trivial.  I believe better than either would be a
>time to voltage converter which just needs a set/reset flip-flop and
>switched current integrator.  Dig up the schematic for a Tektronix
>2232 oscilloscope for a "simple" example that yields 50pS resolution
>using late 1980s  technology.

My mistake.  That should be 500pS.