Re: [SI-LIST] : Rambus vs. di/dt SSN

S. Weir (weirsp@a.crl.com)
Sat, 24 Jul 1999 03:47:12 -0700

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Differential signaling helps a lot.

Regards,

Steve.
At 05:29 PM 7/24/1999 +0800, you wrote:

>
> Hello All SI gurus,
>
> One question about Rambus,
>
> I wonder that the di / dt (current change rate) of rambus is high, how
> rambus can avoid being attacked by SSN / Ground bounce and package noise
> reflection.
>
> Necking down the trace to compensate rambus chips seems to work in certain
> level but not tatotally overcome the package's RLCG.
>
> Does somebody have good idea about this?
>
>
> Thanks,
> John Lin
> SI Engineer at Quanta Computer Inc.
> Email: John@quantatw.com
> Tel:(03) 3979000 ext. 5183.

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Differential signaling helps a lot.

Regards,

Steve.
At 05:29 PM 7/24/1999 +0800, you wrote:

Hello All SI gurus,

One question about Rambus,

I wonder that the di / dt (current change rate)  of rambus is high, how rambus  can avoid being attacked  by SSN / Ground bounce and package noise reflection.

Necking down the trace to compensate rambus chips seems to work in certain level but not tatotally overcome the package's RLCG.

Does somebody have good idea about this?


Thanks,
John Lin
SI Engineer at Quanta Computer Inc.
Email: John@quantatw.com
Tel:(03) 3979000 ext. 5183.


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