for missing the meeting
yesterday, I just returned from vacation and was digging out.
concerned that we are going in
entirely the wrong direction with this, in that it is becoming far too
EDA-centric and not IP supplier-centric enough. And I think the latter
we need to focus on if we are ever to have a robust pool of Serdes
available for the SI engineering community to use.
spoken with a lot of Serdes IP
suppliers, and have never heard any mention of supporting statistical
or LTI TD
or non-LTI TD or partial statistical or full non-LTI TD or any other
of analysis. What I hear is things much more like this:
IBIS-AMI API do I need to use for
my Serdes Tx / Rx? I want to use the most straightforward approach to
- Does the
filtering in my Serdes IO do a
one-time adaptation to my channel? If it does I will use the modified
response approach, since that is simplest.
- Does my
filtering do real-time dynamic
kind of adaptation? If it does, I will need to use the GetWave approach
process waveforms directly.
admittedly a little
over-simplified, but I think is basically on target. I think we would
better to think more along these lines rather than add all the
complexity I see
in these tables below. To be successful, I think we need to keep this
as possible, and enable models to be developed. I would even go as far
say that the most practical approach for a given Serdes IO would be to
either the impulse response or GetWave API, but not both together.
I would be
interested to hear opinions on these
ideas from the people on this list.
Dear AMI experts,
cleaned up the spreadsheet with the truth table that we discussed
our ATM meeting today. It looks like this now:
I hope I got it
right this time.
The next thing I
would like to do is to extend this table
spell out how these conditions can be applied to Tx
Rx independently. In other words, I don't believe
our intent was to require these Booleans to be the
for both Tx and Rx. But how many combinations are
We have four (4)
combinations per buffer, and we have two
which could theoretically allow 4^2 = 16 total
Are they all valid?