[time-nuts] Question for my new GPSDO

[Achim Gratz]

ed breya writes:
> 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.

An y=x³ (cubic) transfer function is monotonic but not linear, yet you
wouldn't necessarily want that in a feedback loop unless your target
point is always zero.  Monotonicity by itself is too weak a constraint,
IMHO.  However if you also constrain INL / DNL you will get better
bracketing on the local feedback gain variation resulting from the slope
changes around different output codes.


Regards
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada