Arpad,
Walter is correct. There was no AMI model used in the simulation. The
comparison was between
1. simulating a random bitstream with time domain circuit simulation and
2. same bitstream with bit by bit channel simulation.
Channel simulation required an accurate characterization of the channel and the
analog front end of the Tx/Rx that was modeled in the IBIS model (which had
asymmetric rise/fall edges).
There was no equalization modeled or simulated.
Thanks,
Ambrish.
From: ibis-macro-bounce@xxxxxxxxxxxxx <ibis-macro-bounce@xxxxxxxxxxxxx> On
Behalf Of Walter Katz
Sent: Friday, February 8, 2019 6:27 PM
To: Arpad_Muranyi@xxxxxxxxxx; ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: A question about asymmetric edges in AMI simulations
EXTERNAL MAIL
Arpad,
What they did had nothing to do with AMI modeling. They (and I) just used the
AMI flow of generating a "Melded Impulse Response" of the channel, and then
convolving it with their "Melded" Impulse response.
We both had no Tx Equalization, and we generated waveforms at the Rx Pad.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>
<ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>> On
Behalf Of Muranyi, Arpad
Sent: Friday, February 8, 2019 4:26 PM
To: ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>
Subject: [ibis-macro] A question about asymmetric edges in AMI simulations
Ken, Kumar, Ambrish,
I was impressed with the presentation you gave at the IBIS Summit at DesignCon
on the
topic of "Channel Simulation Using IBIS Models with Asymmetric Rising and
Falling Edges".
http://www.ibis.org/summits/feb19/willis1.pdf<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ibis.org_summits_feb19_willis1.pdf&d=DwMFAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ-_haXqY&r=0Gavo25Aqgu_F0CPGlNHGxaE1UHA4ptnU3q-kd8FzDQ&m=Hv1hSgpqzKJ7xgNALhVIIW7j9bPWLhynLTsZsnJZwQg&s=nc_aPjLbPhE6Z_XNgZ4aHEMaEOZmJOv7Am8XvQRsOuk&e=>
On slide 2 you mentioned that you were using Micron's y11a.ibs file for the
simulations.
I looked at that file, and noted that it does not have any [Model]s with the
[Algorithmic
Model] keyword. I don't see anything in the slides about what AMI model you
were
using for the "Channel Simulation". I vaguely remember that in the discussion
that followed
the presentation you mentioned that it was a standard AMI model of some sort.
Could you
tell us whose/which AMI models (DLL) you were using to generate the simulation
waveforms
in the presentation?
Thanks,
Arpad
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