[sdiy] VCO comparator's reference voltage - rail OK?

cheater cheater cheater00social at gmail.com
Sun Mar 28 23:47:22 CEST 2021


On Sun, Mar 28, 2021 at 10:50 PM Neil Harper via Synth-diy
<synth-diy at synth-diy.org> wrote:
>
> i have a drawer full of LM431's so i'll use that unless there's a reason
> not to?

You don't want an adjustable voltage reference, you want a precision
constant voltage reference. Your adjustable voltage ref will be only
as good as the resistors you have. So unless you have 0.01%
resistors*, in the exact specific values that you need to get the
voltage you need, you're out of luck.

*needed for 1 cent frequency accuracy


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