Subject: Series elements in Bird 36.2

From: Stephen Peters <[email-masked]>
Date: Mon, 17 Mar 1997 08:55:13 -0800

Hello fellow IBISains:

   There has been a request to modify Bird36.2 (the 
electrical board description) so that the [Path
Description] supports a descrete series element.
I started looking at the problem this weekend and quickly
realized that the existing syntax is able to support a descrete
series element without modification.  This is accomplished
by placing two 'Node' sub-parameters back to back, each calling
out a pin of the two terminal device.  For an example, see 
below:

[Path Description]  Series_example
Pin 5                        | start
Len = 2.2  L=0.5n  C=2.0p /  | section description
Node R7.1                    | pin 1 of series resistor
Node R7.2                    | pin 2 of series resistor
Len = 0.3  L=0.5n  C=2.0p /  | section description
Node U27.3                   | end

  Please note that a parallel terminations to power or ground
can be described using the 'terminator' type model of IBIS V2.2.

  I will be updating the bird to include the above example (along
with some editorial comments) shortly.

  Thanks again for the comments.

                 Regards,
                 Stephen Peters
                 Intel Corp.