[time-nuts] yet another GPSDO design, or so

Hal Murray hmurray at megapathdsl.net
Tue Jun 29 20:05:44 UTC 2010

> or with a pair of current output DACs and a resistive divider/summer so  you
> have a "high order" and "low order" voltage. 

If it were that simple, the manufacturers would package it up into a single 
chip. :)

I think there are two areas of interest.  One is the obvious one that steps 
on the high-order DAC won't cleanly map into a constant number of steps in 
the low-order DAC.

The other is things like temperature shifts.  You have to work out the specs 
for both paths and take the worst one.

These are my opinions, not necessarily my employer's.  I hate spam.

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