[SI-LIST] Re: power/ground connection
- From: "tao xu" <helen.tao.xu@xxxxxxxxx>
- To: venki.pras@xxxxxxxxx
- Date: Wed, 11 Jul 2007 14:30:08 +0800
hi, Pras
the voltage you need to study is between Vcc@die side and gnd@die side
since waveform there is what I/O or core really see in its power and ground
pin. The way you connect ideal power supply is correct. But how to connect
spice ground to package is a case by case questions, which will be decided
by what kind of model you used for package.
Thanks and regards
Tao ( Helen )
On 7/11/07, Pras venki <venki.pras@xxxxxxxxx> wrote:
>
> Hello everyone,
> I m trying to simulate crosstalk, SSN on my package model.
> Now when I m connecting the spice's ideal power supply to my package, I
> connect it between the ball end of the supply net and the ground net. Also
> then I short the ball end of the ground net to ground. Is this setup
> right?
> Coz ppl when they talk abt power/gnd nets, they talk of them in pairs but
> here I m having two separate voltage waveforms - one at Vcc and then the
> other at 0V, which is how I look at it.
>
> Regards,
>
>
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