[sdiy] Temperature compensating capacitors

René Schmitz uzs159 at uni-bonn.de
Wed May 7 11:02:02 CEST 2014

Am 06.05.2014 14:22, schrieb Neil Johnson:

> Hmmm... yes maybe.  I only gave it the merest moment of thought,
> rather than follow through the error flow from CV input to VCO output.

Alright... If I were crazy enough, I could imagine to use them on an AC 
signal, i.e. first modulate the CV, then use it as one leg of a 
capacitive divider, then demodulate again. But sure thats too weird an 

> These capacitors are intended for RF applications (VCOs, filters,
> etc), and in a cost-sensitive product every component counts so you
> can do with a fancy capacitor where you would otherwise need an
> ordinary capacitor and a ptat sensor.

(Actually in a standard expo the PTAT can be had for next to nothing.)
And yes, I think these caps are mostly useful for RF, think of the 
things that radio hams do in order to keep their LO stable by using caps 
with different dielectrics to compensate for each other.


uzs159 at uni-bonn.de

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