[SI-LIST] Re: Using W-element in HSPICE

On item three that sure looks edge coupled
to me.  Is that what you meant?

MG

-----Original Message-----
From: Bob Patel [mailto:whizplayer@xxxxxxxxx]
Sent: Wednesday, May 29, 2002 4:15 PM
To: si_list
Subject: [SI-LIST] Using W-element in HSPICE



Hi!
I had looked up the past archives on this subject
pertaining to the definition of differential pairs. I
had additional questions as to 
1)if I am extracting the RLGC for a diff pair do I
apply the stimulus to one node only. And if YES then
shouldn't I excite both the nodes differentially i.e.
positive going to one node and inverting to the other.
2)Also when defining the stimulus does the stimulus
have to represent the source of the frequency of
interest i.e. the RLGC will be extracted based on the
pulse source. e.g. at 2.5GHz the pulse source is (3.3
0 100ps 50p 50p 150p 400p)
3)When defining the model statement for the broadside
coupled pair 
+ CONDUCTOR = ( MATERIAL=copper, SHAPE=rect,
ORIGIN=(0, 7.2mil) )
+ CONDUCTOR = ( MATERIAL=copper, SHAPE=rect,
ORIGIN=(17mil, 7.2mil
i.e. the traces are 6mil above the gnd plane and are
separated by 11mil & are 1.2mil thick. Is this
correct?
Thanks in advance.
Bob

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