Re: Caps to reduce noise

From: Eeyore <rabbitsfriendsandrelations@xxxxxxxxxxx>
Date: Sun, 11 Jan 2009 18:29:50 +0000

sungjack0@xxxxxxxxx wrote:

Hi All
I?ve seen that everybody put a 0.1uF Capacitance and some other a
0.01uF and a 0.1uF Capacitance near each IC in their board to reduce
noise.

Not noise, but power supply 'bounce' as current is drawn.

But I?ve never seen an article that discusses how to calculate the
capacitance that is needed.
Do you know a formula to calculate the capacitance that is needed or
an article that discuss the caps that is needed?

It's largely empirical.

Graham

.

References:
- Caps to reduce noise
  - From: sungjack0

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