How to annotate DC operation points in monte calro simulation?

Dear zuiyang,

zuiying said:

The "print dc operation poins" button is valid. So I think the dc operation points has been saved successfully. But I don't know why the "annotate DC operation points" is invalid.

It appears you are running a set of DC analyses where you are sweeping the junction temperature from 10 to 70 degrees. As such, there is a DC operating point at each temperature of the sweep. If there are 7 sweeps, there are 7 DC operating points. Therefore, I believe the set of "Annotate-> <any-parameter> menu is not applicable as there is not a single DC operating point to use for the annotation.

You might try to run two DC tests as part of your Monte-Carlo simulations - one test where you sweep the temperature and a second where you run only a DC operating point at a single temperature ( and save it). My thought is that you will be able to annotate the schematic with the Monte Carlo simulation result for each Monte Carlo iteration of the DC operating point simulation as there is only DC operating point for each iteration.

Shawn

Dear  ShawnLogan

Thanks for your help! But when I run only a DC operating point at a single temperature and save it, the "annotate DC operation ponits" button is still invalid. 

The "print DC operation points" button is valid. And I can print DC operation points successfully.

It is really strange.

zuiying

Dear  ShawnLogan

Thanks for your help! But when I run only a DC operating point at a single temperature and save it, the "annotate DC operation ponits" button is still invalid. 

The "print DC operation points" button is valid. And I can print DC operation points successfully.

It is really strange.

zuiying

Zuiying,

The sweep in the DC doesn't matter (sorry Shawn - also when you do a DC sweep it does not do an operating point analysis at each sweep point, or rather it might, but it doesn't save it). You have however selected the save operating point checkbox which means it will save the DC operating point and then do a DC sweep.

Given your screen shots, I think you might be pressing the Right Mouse button click to show the menu with your cursor in the wrong place. Please do it over the "mc" column, over one of the output waveform icons. I think you are doing it too far to the left, which will try to look at results across corners, which doesn't make sense here (I'm assuming this because you have either the test name or output name selected when your screen shot is shown, and your cursor needs to be over the specific corner you're trying to annotate; yes, you only have one corner here, but to generalise the problem you might have many and it wouldn't know which corner you were trying to annotate).

If that doesn't work, please state which IC sub-version you're using.

Andrew

Andrew Beckett,

Thanks for your help! When I put cursors over the "mc" column, the "annotate" button is still invalid. My IC sub-version is here:

The spectre version is here.

zuiying

That still doesn't appear to be over the actual output column since the test name is highlighted. Also, you showed the simulator version, not the IC version. However, given that you're using a simulator from 8 years ago, I suspect you're using a similarly ancient IC version, and you're also using the obsolete ADE XL (replaced by ADE Assembler).

I would suggest that at the very least you use something much more recent - this might be some strange bug in a very old version - getting to the bottom of this in a forum is likely to be difficult.

Andrew