RE: IBIS comments to the EDIF committee

Hello David:

    Regarding your questions below I'm going to give you
my interpretation, but I think the simulator vendor folks
need to give you the final word.

  1. Yes, an IBIS file should be associated with a 'part' rather
than each component instance.

  2. The RLC values we are talking about refer to descrete components.
A board my have descrete resistor, capacitor and inductor components
connected as part of a net. The simulator vendors must have a way to
clearly and uniquely extract from the EDIF description the values of
these components (i.e. 50 ohms, 20pF).

               Stephen

> On Thu, 23 May 1996 11:06:10 David Wiens wrote:

Stephen,

In working up the EDIF proposal, I came up with a few things I want run
past you...

1. In EDIF, a 'component' is an instance of a 'part'. Given the choice,
I'm assuming we want to attach IBIS models to parts, not components.

2. Regarding the issue of one location for RLC values...
    - There aren't ANY places I can find within EDIF that define RLC, so
      the only way to add them would be using the 'property' name/value type.
      Unfortunately, this can
      be done under about any element type.
    - The real point I'm missing is why we care about RLCs within EDIF
      if we can properly point at IBIS and get them there for package and die
      pins.

David Wiens
Received on Thu May 23 09:43:54 1996