[ibis-macro] Re: Gathering feedback. In the AMI_Init flow, the RX IBIS-AMI model to output the cursor sampling point with regards to a pulse response or step response?

From: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
To: "ibis-macro@xxxxxxxxxxxxx" <ibis-macro@xxxxxxxxxxxxx>
Date: Wed, 1 Apr 2020 00:28:28 +0000

Walter, Hansel,

I would suggest to use a terminology that exists in the IBIS specification
already.
I searched through the spec, and I could only find "impulse response" in it,
nothing
else. "Step response", "pulse response" does not occur a single time in the
spec.
(unless I missed them)...

I am not opposed at innovation and new things in the spec, but we need to be
very
careful about introducing such things. Any new terminology or concept etc.
needs
careful definition to make sure everyone understands it the same way...

Thanks

Arpad
================================================================

From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] ;
On Behalf Of Walter Katz
Sent: Tuesday, March 31, 2020 3:05 PM
To: Hansel Dsilva <hanseldsilva@xxxxxxxxxxxx>; ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: Gathering feedback. In the AMI_Init flow, the RX
IBIS-AMI model to output the cursor sampling point with regards to a pulse
response or step response?

Hansel,

I recommend you use the Pulse Response jargon.

Walter

From: Hansel Dsilva
<hanseldsilva@xxxxxxxxxxxx<mailto:hanseldsilva@xxxxxxxxxxxx>>
Sent: Tuesday, March 31, 2020 3:59 PM
To: Walter Katz <wkatz@xxxxxxxxxxxxx<mailto:wkatz@xxxxxxxxxxxxx>>;
ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>
Subject: RE: Gathering feedback. In the AMI_Init flow, the RX IBIS-AMI model to
output the cursor sampling point with regards to a pulse response or step
response?

Hi Walter,

I thank you for the prompt reply.

Yes, that is correct the number is the same but the jargon that needs to go
into the specification may require us to mention either a pulse or step
response.

I too have been scratching my head over the last week and hence thought it
would be best to enable a discussion if a BIRD is to be drafted.

Thanks,
Hansel Dsilva

From: Walter Katz <wkatz@xxxxxxxxxxxxx<mailto:wkatz@xxxxxxxxxxxxx>>
Sent: 01 April 2020 01:25 AM
To: Hansel Dsilva
<hanseldsilva@xxxxxxxxxxxx<mailto:hanseldsilva@xxxxxxxxxxxx>>;
ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>
Subject: RE: Gathering feedback. In the AMI_Init flow, the RX IBIS-AMI model to
output the cursor sampling point with regards to a pulse response or step
response?

Hansel,

I think the number reported is the same whether doing a Pulse response or a
Step response analysis.

Walter

From: ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>
<ibis-macro-bounce@xxxxxxxxxxxxx<mailto:ibis-macro-bounce@xxxxxxxxxxxxx>> On
Behalf Of Hansel Dsilva
Sent: Tuesday, March 31, 2020 3:23 PM
To: ibis-macro@xxxxxxxxxxxxx<mailto:ibis-macro@xxxxxxxxxxxxx>
Subject: [ibis-macro] Gathering feedback. In the AMI_Init flow, the RX IBIS-AMI
model to output the cursor sampling point with regards to a pulse response or
step response?

Hi,

Subject, "Gap in IBIS for sampling with statistical mode AMI models",
presentation at the DesignCon 2020 IBIS Summit.

We are working on a BIRD in enabling when in the AMI_Init flow for an RX
IBIS-AMI model to tell the EDA tool the cursor sampling point time (seconds).

In IBISv7.0, the AMI_Init flow calls out an impulse response which involves a
stimulus of 1/time step and does not have any information on the unit interval
(UI).

The question to ourselves is whether it would it be preferable to make the RX
IBIS-AMI model when in the AMI_Init flow to output the cursor sampling point
with regards to a pulse response or step response?

Below is a overview on impulse, pulse and step response in enabling a
discussion. Feel free to correct me if I happen to be going in the wrong
direction.

[cid:image001.jpg@01D60792.8CFB2FE0]

Thanks,

Hansel Dsilva

References:

[ibis-macro] Re: Gathering feedback. In the AMI_Init flow, the RX IBIS-AMI model to output the cursor sampling point with regards to a pulse response or step response?

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