[time-nuts] GPSDO simulation tool

Hal Murray hmurray at megapathdsl.net
Mon Mar 24 02:12:59 EDT 2014

magnus at rubidium.dyndns.org said:
> I did a temporary hack on the PID code to convert the D-term into I^2  term,
> by integrating the integrator output. First attempt was indeed  quite
> resonant just to show that I was in the unsafe region. Backing  down on the
> strength of the component sure did remove much of the  resonance, but I did
> not see any appreciable improvement in filtering  performance, so quick and
> dirty hacking isn't sufficient, darn. 

Maybe it isn't sufficient to make a great GPSDO, but it's more than 
sufficient to point out the advantages of Tom's simulation setup.

Thanks Tom.

These are my opinions.  I hate spam.

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