Dear all,

I experience problems when I set up a corner analysis using ADE and then export it to an OCEAN script
(or even without exporting it).

Basically, in the OCEAN script there's a statement like this:

Code:

corSetMeasExpression( "ton" "(cross(VT(\"/up\") 0.9 -1 'falling) - cross(VT(\"/up\") 0.9 -1 'rising))" )
 

Of course, for corner analysis, I would like to replace the fixed 0.9 by Vdd/2.
Vdd is certainly a parameter of my netlist and added to my corner setup file .pcf.

When I replace the above code by the following:
Code:

corSetMeasExpression( "ton" "(cross(VT(\"/up\") "Vdd/2" -1 'falling) - cross(VT(\"/up\") "Vdd/2" -1 'rising))" )
 

my OCEAN corner script is not able to output these results over corners. Furthermore, the corner analysis GUI
reacts in the same way (only a fixed number works...)

Has anyone a solution for this? I can't imagine this cannot be setup under Cadence...

Kind Regards

Peter

Dear ACWong,

thanks for your reply.

Is there anywhere in the documentation this is mentioned? I went through all relevant manuals/user guides and could not find anything...

Kind Regards

Peter

Dear ACWong,

my mistake, it DOES work, it is just case sensitive.

Any pointer to the relevant piece of documentation would be welcome!

Kind Regards

Peter

No, desVar() would not be used inside an expression like this. desVar() is for setting and retrieving design variables in OCEAN. VAR() is for accessing the value of a design variable (or swept design variable) in an output expression in a parametric or corner sweep.

Regards,

Andrew.