ADE-XL retrieve values and calculate min

Hi Pedro,

If you have an output called "PM", then add another output called maxPM with the expression ymax(PM) or ymax(calcVal("PM")) and then set the evalType column to "corner" so that it evaluates the maximum across corners. You could use ymin too for the minimum. You could then put a spec on these outputs too.

Regards,

Andrew.

Hi Andrew,

Thank you for your answer.

I had tried that approach, but wasn't working since I was using "min" instead of "ymin". To me, as PM is a value, it makes no sense to use "ymin"/"xmin" (maybe the "min" function doesn't exist on ADE-XL at all for this purpose).

Now, I have the following expression, that works:-)

ymin(getData("phaseMargin" ?result "stb_margin") ?overall t) -> ?overall t is added automatically I don't know why.

Now that it's working, when I plot, the graph is PM vs design point instead of PM vs the value of the variable being swept. Can you, please, help me with this?

Best regards,

Pedro

It's ymin because if you just had the getData expression, you'd get the phaseMargin versus the corner - and that's a waveform, so it needs to know it's the minimum y value of that waveform. The ?overall t is added whenever you use the "measurement across corners" (setting eval type to "corners") because had the inside of the ymin be a waveform, this would find the minimum across all the individual curves and families of curves.

How are you plotting it? Given that it's just a single number, why would you plot it? Or are you doing sweeps as well? If so, which plot menu or choice are you using? (A picture might help)

Regards,

Andrew.

Hi Andrew,

I have a global variable set as below:

ampLoad = 1n 1u 1m 10m 100m 200m (this is not really a sweep since I am assigning discrete values to the variable, I guess)

Corners will be the normal PVT corners: actives, passives,temperature, etc.

On ADE-XL I just right click the result of my expression and do "plot all". That will plot Phase Margin values per design point, which is correct. But I don't want to have on the xx axis 1 2 3 4 ... , I would like to have 1u 1m 10m ....

Best regards,

Pedro

Pedro,

This appears to be a bug. I filed CCR 2165705 to get this fixed in ADE Assembler (we may not fix it in ADE XL since ADE XL is in "sunset" mode). You might want to report this to customer support too and ask for a duplicate CCR to be filed. It seems that using Plot All, Plot across Corners  (not sure why that's even available for a MAC expression) and Plot across Design Points all plot exactly the same way - versus the Design_Point, and I think Plot All should plot against the swept variable (even if it's discrete points).

Regards,

Andrew.