[time-nuts] Question for my new GPSDO

[ed breya]

I think the main need for the overall DAC system in these is not 
linearity, but monotonicity - an increasing digital input always causes 
an output change in one direction only, and never reverses. The 
linearity and other characteristics of the sub-parts comes into play 
when you need to combine parts and methods to increase the resolution. A 
KVD may have some nonlinearity, but is inherently monotonic.

Ed