Re: To PID or not to PID

Tim Wescott <tim@xxxxxxxxxxxxxxxx> wrote in
news:11c83jjd7et286b@xxxxxxxxxxxxxxxxxx:

> Your analog board should have an anti-aliasing filter on it. If you are
> designing the board and use a switched-capacitor filter you'll need to
> remember that being a switched device it has its own aliasing and you
> may or may not need to preceed it with a small anti-aliasing filter.

I've also had problems with clock bleed-through with switched-cap filters,
and often put a simple RC filter on the output, as high in frequency above
my pass-band as I can and still deal with the transients. In fairness, I
haven't used switched caps in some time, so the latest greatest might not
have this problem.

Scott
.

Relevant Pages

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