Re: .EBD question

Kellee,

The Fork/Endfork notation implements what is commonly called a
Directed Acyclic Graph. The key term here is "acyclic", meaning
you can not have loops. Notations that allow loops, like SPICE,
almost always do so by naming the nodes so that multiple references
into a node are accepted.

Mike LaBonte
Cadence Design Systems

Kellee Crisafulli wrote:
>
> Hello Ibisians,
>
> This came up in a conversation recently and I did not
> know the answer.
> How do you describe a loop in a trace layout with the
> [Path Description] in a .EBD file?
>
> For example:
> Pin 1
> *
> *
> ****
> * *
> ****
> *
> *
> Pin 2
>
> [Path Description] LOOP
> Pin 1
> Len = 1.0 L = 1.0n C= 2.0p /
> Fork
> Len = 1.0 L = 1.0n C= 2.0p /
> Len = 1.0 L = 1.0n C= 2.0p /
> Len = 1.0 L = 1.0n C= 2.0p
> Endfork
> |
> |now what do I do to close the loop?
> |
> Len = 1.0 L = 1.0n C= 2.0p /
> Pin 2
>
> ---------------------------------------------------------
> Have a great day....
> Kellee Crisafulli at HyperLynx
> SI,EMC,X-talk and IBIS tools for the Windows platform
> E-mail: <mailto:kellee@hyperlynx.com>
> web: <http://www.hyperlynx.com>
> ---------------------------------------------------------
Received on Fri Dec 18 10:21:25 1998