[volt-nuts] How to keep voltage stable in the sub-100nV range?

[Poul-Henning Kamp]

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In message <20161101131416.b99ff94ae493bb993f841968 at kinali.ch>, Attila Kinali writes:

>I have a "small" side project, which involves keeping a voltage stable
>to better than 100nV over the period of several seconds. Ie. a DAC
>produces an output and a chain of opamps and low pass filters feeds
>it to the consuming device. The absolute value and drift over more
>than 10-100s is not that important.

What range of voltages are we talking about ?

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