[SI-LIST] Re: IBIS & Cable
- From: "Jon Powell" <jonpowell@xxxxxxxxxxxx>
- To: <subramanya@xxxxxxxxxxxxx>, <ched_chang@xxxxxxxxxxx>
- Date: Wed, 26 Feb 2003 08:58:06 -0800
I agree,
Ibis was not intended (and has not been enhanced) to provide the proper data
for accurate modeling of connectors, small boards, or cables.
For that sort of modeling you should research into the capabilities of your
simulator. Many times the problems with cable simulation will be centered
around the simulators assumption of some existing perfect ground. (this is
NOT true of all simulators so have to check out what yours is doing).
jon
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Subramanya C K
Sent: Wednesday, February 26, 2003 4:14 AM
To: ched_chang@xxxxxxxxxxx
Cc: SI List
Subject: [SI-LIST] Re: IBIS & Cable
Dear Chai,
If I am correct, you are trying to simulate a system with cable connector on
the board feeding an external cable. In which case, it will not be proper to
define the Cable characteristics in the IBIS or EBD model of your feeder
connector. This way of defining the connectors is known as Multi-line
modeling- which has a few drawbacks such as pins of both connectors will
have to be treated as pins of a single connector, so coupling between pins
and coupling between cable and connector cannot be taken into consideration
(some times).
Depending on your simulator, you can write a topology file which defines the
interconnection between the feeder and cable. And the interconnection could
be assigned with L and C parameters along with L, C and Z parameters of the
cable.
Hope this will help.
Regards,
Subramanya
----- Original Message -----
From: "Ched-Chang Chai" <ched_chang@xxxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Wednesday, February 26, 2003 4:01 PM
Subject: [SI-LIST] IBIS & Cable
>
> Dear all,
>
> If I have a board with a connector, which will be further connected to
> another board through a cable.
> Is it possible to include the cable electric characteristics (R,L,C, Zo,
> length, etc) in the IBIS model?
>
> Thank you very much in advance.
> --
> Regards,
> Chai
>
>
>
>
>
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