[SI-LIST] Re: Eye diagram measurement - And leaves your teeth Shiny White Too!
- From: "Pratt, Gary" <gary_pratt@xxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 6 Apr 2005 12:18:26 -0400
Of course, automated measurements is another benefit to AMS that hasn't
received a lot of attention on the list. Creating an AMS receiver model
that outputs eye measurements would be a very straightforward task.
Actually, the device wouldn't have to be in the receiver, it could be
attached anywhere in the circuit using [external circuit] in a "macro"
fashion. =20
The model would do its calculations during the simulation providing
incremental data during the simulation, and the final results
immediately at the end of the simulation. Watching the results progress
towards and asymptote may provide a feel for adequacy of coverage and
simulation time requirements. Consisting of mostly sequential coding
(which is partitioned to the event-driven solver), the measurement would
have minimal impact on the overall simulation time. =20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Scott McMorrow
Sent: Wednesday, April 06, 2005 10:22 AM
To: Jim Antonellis
Cc: edpc108@xxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Eye diagram measurement
The trick is one set of measure statements to cover each bit cell, which
results in 100's, 1000's or 10000's of measure statements for an entire
simulated data stream. It can be done and implemented with a script
that parses the excitation pattern, and then processes all of the
measurement results. It is not pretty. It is an exceedingly slow post
processing operation in HSPICE, when the time resolution is down in the
1ps range. Which is why other external waveform processing, as is done
in the SiSoft tools, is more desireable.
scott
Scott McMorrow
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
(401) 284-1827 Business
(401) 284-1840 Fax
http://www.teraspeed.com
Teraspeed(r) is the registered service mark of Teraspeed Consulting
Group LLC
Jim Antonellis wrote:
>Hi Scott, Jaaprakash,
>
>I looked into this a while back, and I thought using the HSPICE=20
>.MEASURE construct you did not have the ability to make multiple bit=20
>cell measurements. Could you please share the .MEASURE syntax that=20
>would make this possible as I had to resort to a post-proc spreadsheet=20
>last time I did it.... and would greatfully appreciate the "trick".
>
>Thx,
>Jim
>
>
>-
>Jim Antonellis janton@xxxxxxxxxxxxx
>Sandburst Corp www.sandburst.com
>Office: 978.689.1669
>Cell: 978.618.4745
>
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>-----Original Message-----
>From: si-list-bounce@xxxxxxxxxxxxx
>[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Scott McMorrow
>Sent: Wednesday, April 06, 2005 11:12 AM
>To: edpc108@xxxxxxxxx
>Cc: si-list@xxxxxxxxxxxxx
>Subject: [SI-LIST] Re: Eye diagram measurement
>
>
>Jaaprakash,
>
>Yes. It can be done with .measure statements, or it can be done with=20
>SiSoft's SiAuditor measurement capability.
>
>scott
>
>Scott McMorrow
>Teraspeed Consulting Group LLC
>121 North River Drive
>Narragansett, RI 02882
>(401) 284-1827 Business
>(401) 284-1840 Fax
>
>http://www.teraspeed.com
>
>Teraspeed(r) is the registered service mark of Teraspeed Consulting
Group=20
>LLC
>
>
>
>Jayaprakash wrote:
>
> =20
>
>>Hi ,
>>
>> Is it possible to measure eye diagram height and width (not=20
>>graphically) in HSPICE simulations?
>>
>> Thanks,
>>
>>Best regards,
>> Jayaprakash.
>>
>>
>>
>>Send instant messages to your online friends=20
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