From: Heard, Chris ([email protected])
Date: Sun Aug 27 2000 - 18:08:38 PDT
Sharp corners on the rising edge "waveform" in IBIS models can exaggerate
the effects of a C-R-L-C connector model only 1" away. Can IBIS models
support piecewise-linear descriptions of a rising edge?
Also, I've seen too many simplified connector models, like the one being
used here that claim an inductance a whole lot higher than actual, even
though a C-R-L-C model is much easier to use than a 10 page, 30 conductor
model that includes every third order effect on the planet.
Chris
-----Original Message-----
From: Ken Egan [mailto:[email protected]]
Sent: Saturday, August 26, 2000 3:32 PM
To: silist
Subject: [SI-LIST] : simple ?? newbie issue
I'm relatively new to si, but not HSpice. I'm rather confused on how to
accurately simulate
a simple signal.
I've got an IBIS model for the driver/reciever pair.
network looks like this....
|\ |\
| \ 1" 4" 1" | \
| /------- TL--------R--L-------TL_-------R--L--------TL---------| /
|/ (R) | | | | |/
C C C C
| | | | <----- this mess is a
connector model
GND GND GND GND
No matter the series termination, this resultant signal looks like sh***.
( no the rs is not shown above ).
Basically, I'm trying out the circuit shown in Intel's Low-Power Module
Memory Bus Simulation Methodology.
Thanks,
Ken
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