[SI-LIST] Re: PDS analysis?
- From: steve weir <weirsi@xxxxxxxxxx>
- To: "Bowden, Ivor" <ibowden@xxxxxxxxxxxxxxxxx>
- Date: Sun, 30 Mar 2008 12:59:40 -0700
Ivor, this is a case where the resonance between two elements in the PDN
occurred at 600MHz. We changed one capacitor to a 100pF rated X2Y
eliminating the problem.
Regards,
Steve.
Bowden, Ivor wrote:
>
> -----Original Message-----
> From: steve weir [mailto:weirsi@xxxxxxxxxx]
>
> “I've got examples that occur way above 100MHz. We just worked one
> recently where the resonance was about 600MHz. We handily corrected it
> with a single X2Y capacitor.”
>
> Steve, could you elaborate slightly on that case? Was this an existing
> bypass cap that you changed value and/or type on, or did you add a new
> cap to the design? This is the kind of example I’m interested in. If
> you have handy any links to similar case studies please do.
>
> Thanks,
>
> Ivor
>
>
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