[SI-LIST] Re: Decoupling Analysis for analog rails
- From: "Shao, Peng" <Peng_Shao@xxxxxxxxxx>
- To: "<bala89si@xxxxxxxxx>" <bala89si@xxxxxxxxx>
- Date: Thu, 21 Mar 2013 08:07:16 +0000
Could not you account this ferrite bead into the VRM model?
Peng Shao
在 2013-3-21，14:24，"Balaji G" <bala89si@xxxxxxxxx> 写道：
> Hi all,
> We have analog and digital rails on our board. In case of Digital rails,
> we assign the VRM as source and provide the Lslew, Rflat, L0, R0 values to
> it and we get the PDN frequency response. In case of Analog rails where we
> have a ferrite between the source and load, VRM will not be present if an
> Analog net is selected. Should I consider the ferrite as source and check
> for decoupling? Is it a correct way of checking decoupling for analog
> rails? I believe most of the tools available doesn't consider the ferrite
> bead in decoupling analysis eventhough its assigned with a model. I will be
> happy to implement, if there is a suggestion.
>
> Regards,
> Balaji
>
>
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