--------
In message <[email protected]>, David writes:

>When I looked into this a couple months ago in connection with
>building a long time constant integrator for an analog only GPSDO, the
>primary limitation was insulation resistance of the capacitor.  Even
>the best low dielectric constant C0G/NP0 capacitors were much worse
>than polypropylene film which was itself was much better than
>polyester.

We should add that there is a LOT of good wisdom about a lot of relevant
electronic details in r3 of Art of Electronics.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.
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