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Simulators >> RF Simulators >> ADEXL Monte Carlo Simulation Error: no statistical data generated for the test
https://designers-guide.org/forum/YaBB.pl?num=1337796738

Message started by ranran on May 23^rd, 2012, 11:12am

Title: ADEXL Monte Carlo Simulation Error: no statistical data generated for the test
Post by ranran on May 23^rd, 2012, 11:12am

Hey all, I am encountering a problem when running Monte Carlo simulation in ADE XL. I want to use Monte Carlo mismatch simulation to find out the achievable IIP2 of a passive mixer at each corner (typical fast and slow). I am using virtuoso 6.1.4 and IBM cms9flp design kit. At the end of the running it gives the warning as follows:
ADEXL-5052: Monte Carlo run stopped because no statistical data generated for the test: XXX
1. In the output setup, I did add a scalar expression of IIP2, but it is a little bit complicated because my in/output signal is current. I have IIP2=ipn(hb2dBm hb1dBm 2 1), where I substitute hb2dBm and hb1dBm with dBm version of hb1 and hb2 where
hb1=harmonic(i("/V14/PLUS" ?result "sweephb_hb_fi-sweep") list(-1 0 1)) ---- fund
and hb2=harmonic(i("/V14/PLUS" ?result "sweephb_hb_fi-sweep") list(0 -1 1)) ---- 2nd order harmonic
2. For the corner setup, I turned off the process variation switch, customized the model file of design.scs for each corner and included them in the corner setup window. I also chose method "All" for Monte Carlo setup.

I am guessing the problem comes from step 1 with the expression for IIP2, but I dont know exactly where because it worked well for single simulation in ADE L.. and it is a scalar. Anyone has experience on this? Any help will be really appreciated :)

Title: Re: ADEXL Monte Carlo Simulation Error: no statistical data generated for the test
Post by oermens on May 29^th, 2012, 5:36am

Last time I used an IBM process, all the switches for process corner and statistics were in design.scs, and the model guide gave instructions on how to set different parameters to change the corner and enable/disable statistics. I believe you need to select "All" when doing either process or mismatch analysis, based on how your design.scs is configured it will evaluate the corresponding statistics.

Title: Re: ADEXL Monte Carlo Simulation Error: no statistical data generated for the test
Post by ranran on Jun 3^rd, 2012, 11:50am

Yes you are right, and it works well now. Thanks, oermens.