Re: gEDA-user: Edge ringing filtering

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

On Thu, Mar 02, 2006 at 03:05:35PM -0800, joeft wrote:
> If I understand your description correctly, you need to raise the 
> impedance of the 2.5cm wire at 200 MHz to keep it from conducting 
> interference to the outside of the box.  Is this wire used for power?  
> If so, get a ferrite core (toroid)  and put it over the wire; pass the 
> wire through it a few times if you can.
> 
> Also, 100 nF caps may be beyond self resonance at 200 MHz depending on 
> their construction.  Check the manufacturer's data sheet.  It may help 
> to put a smaller cap (100 pF) in parallel with the 10 & 100 nF if 200 
> MHz is your problem.

But together with the other caps they form a complex RLC network.
What's the typical ESR of these caps so I can simulate it and look what
happens there?

CL<