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Simulators >> Circuit Simulators >> About monte carlo analysis
https://designers-guide.org/forum/YaBB.pl?num=1277403352

Message started by wunderkind on Jun 24^th, 2010, 11:15am

Title: About monte carlo analysis
Post by wunderkind on Jun 24^th, 2010, 11:15am

Hi all,

I want to simulate the offset of a comparator and want to follow the way mentioned in this document:

http://www.designers-guide.org/Analysis/comparator.pdf

However, i don't know how to store the comparator's results into a file. I used the sampler found in designer's guide community, the link is:

http://www.designers-guide.org/VerilogAMS/functional-blocks/smplr/sampler.vams

But the problem is the content of the file will be replaced each time when one run of Monte Carlo analysis is finished so that I can only get the comparator's results for the last run of Monte Carlo analysis.

I am just wondering how to store all comparator's results.

Thank you

Title: Re: About monte carlo analysis
Post by pancho_hideboo on Jun 24^th, 2010, 11:21am

wunderkind wrote on Jun 24^th, 2010, 11:15am:

But the problem is the content of the file will be replaced each time when one run of Monte Carlo analysis is finished
so that I can only get the comparator's results for the last run of Monte Carlo analysis.

It depends on what simulator you use.

What simulator do you use ?

Show me netlist regarding analysis statements including monte carlo analysis.

Title: Re: About monte carlo analysis
Post by wunderkind on Jun 24^th, 2010, 11:25am

pancho_hideboo wrote on Jun 24^th, 2010, 11:21am:

wunderkind wrote on Jun 24^th, 2010, 11:15am:

But the problem is the content of the file will be replaced each time when one run of Monte Carlo analysis is finished so that I can only get the comparator's results for the last run of Monte Carlo analysis.

It depends on what simulator you use.

What simulator do you use ?

The simulator I use is Cadence Spectre

Title: Re: About monte carlo analysis
Post by pancho_hideboo on Jun 24^th, 2010, 11:30am

wunderkind wrote on Jun 24^th, 2010, 11:25am:

The simulator I use is Cadence Spectre

Set "savefamilyplots=yes" in montecarlo analysis statement.

Title: Re: About monte carlo analysis
Post by wunderkind on Jun 24^th, 2010, 1:46pm

pancho_hideboo wrote on Jun 24^th, 2010, 11:30am:

wunderkind wrote on Jun 24^th, 2010, 11:25am:

The simulator I use is Cadence Spectre

Set "savefamilyplots=yes" in montecarlo analysis statement.

I have tried this, but it doesn't work

Title: Re: About monte carlo analysis
Post by pancho_hideboo on Jun 25^th, 2010, 3:57am

wunderkind wrote on Jun 24^th, 2010, 1:46pm:

I have tried this, but it doesn't work

Show me netlist regarding analysis statements including monte carlo analysis.

If you see result's data by using "Results Browser", there are many result's data.
Do you use correct data which include all trial data in monte carlo ?

Title: Re: About monte carlo analysis
Post by wunderkind on Jun 28^th, 2010, 4:03pm

pancho_hideboo wrote on Jun 25^th, 2010, 3:57am:

wunderkind wrote on Jun 24^th, 2010, 1:46pm:

I have tried this, but it doesn't work

I have solved my problem by modifying the sentence of "file = $fopen(filename)" to "file = $fopen(filename, "a")" in the VerilogA for sampler. In such a way that I can get all Monte Carlo simulation results

Title: Re: About monte carlo analysis
Post by wunderkind on Jun 28^th, 2010, 4:04pm

pancho_hideboo wrote on Jun 25^th, 2010, 3:57am:

wunderkind wrote on Jun 24^th, 2010, 1:46pm:

I have tried this, but it doesn't work

Thank you very much, pancho_hideboo!!