[SI-LIST] Re: Guard traces for differential pairs
- From: Duane Takahashi <duanet@xxxxxxxxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 29 Sep 2003 16:16:47 -0700
Sorry for the confusion. I meant the dominant xtalk mechanism could be
capacitive or inductive. There won't be any zero valued off diagonal
elements.
Duane
> I would love to learn how could xtalk be "capacitive" or "inductive" only.
> Are you saying you can have non-zero off diagonal element on one (C or L)
> matrix while the other is zero ?
> Chris
>
> -----Original Message-----
> From: Duane Takahashi [mailto:duanet@xxxxxxxxxxxxxxxxxxxxxx]
> Sent: Monday, September 29, 2003 8:56 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Guard traces for differential pairs
>
>
> It also depends on the type of crosstalk: electric or magnetic (
> capacitive or inductive ). If it's magnetic, guard traces won't help.
> If it's capacitive, guards will help but will leave you with the
> 'magnetic remainder' of the xtalk.
>
> I've seen high impedance lines, more than 60 ohms, exhibit inductive
> xtalk. My guess is guard traces would not have helped in this case.
>
> Regards,
> Duane
>
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--
Duane Takahashi phone: 408-235-4200
Greenfield Networks fax: 408-727-7790
3260 Jay St. email: duanet@xxxxxxxxxxxxxxxxxxxxxx
Santa Clara, CA 95054
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