Re: [SI-LIST] : simple ?? newbie issue

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From: Scott McMorrow (scott@vasthorizons.com)
Date: Sun Aug 27 2000 - 18:28:16 PDT


Yes, IBIS waveform tables are equivalent to piecewise-linear descriptions
of a rising/falling edge into a specific transmission line load. They work
correctly in HSPICE version 99.4 and later. They can be quite accurate if
extracted with enough points.

regards,

scott

--
Scott McMorrow
Principal Engineer
SiQual, Signal Quality Engineering
18735 SW Boones Ferry Road
Tualatin, OR  97062-3090
(503) 885-1231
http://www.siqual.com

"Heard, Chris" wrote:

> 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:kegan@interactivesi.com] > 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 > > **** To unsubscribe from si-list or si-list-digest: send e-mail to > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. > si-list archives are accessible at http://www.qsl.net/wb6tpu > **** > > **** To unsubscribe from si-list or si-list-digest: send e-mail to > majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE > si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. > si-list archives are accessible at http://www.qsl.net/wb6tpu > ****

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