Problem with analog artist simulation

Hallo Group,

I am simulating a circuit containing MOS Transistors.
For debugging I'd like to have the Current through a Drain
plotted. Unfortunately the MOS Transistor is not modelled as a plain BSIM3V3 Model, but as a complex subcircuit. Therefore the current through the drain is not available as such simple value, but would have to be calculated as the sum of some (internal) subcircuit currents).
Is there still a way to handle the transistor as a simple symbol and have the current through drain plotted(without tricks eg, inserting a 0V voltage supply in series) ?

rds

 

Gunther,

First of all you have to select your
currents to be saved in ADE 'Outputs->Save All...',
but I assume you already know that.

Second you have to modify your cell CDF siminfo for the required
simulator and define a 'termMapping' and
add an 'opParamExprList'.
Refer to
'Component Description Format User Guide',
Appendix B 'Accessing Subcircuit Simulation Data',
'Accessing Subcircuit Port Currents' &
'Accessing Subcircuit Model Parameter and Operating Point Information'

e.g.

cdfId->simInfo->spectre = '( nil
componentName nmos_rf
propMapping nil
namePrefix ""
otherParameters (model)
instParameters (lr nr wr)
termOrder (D G S B)
termMapping (nil D \:d G \:g S \:s B \:b)
opParamExprList (("cdg" "OP(mappedRoot(\".m0\") \"cdg\")") ....
)


Bernd

 

Hello,

did you try to use an Inline Subcircuit to model this transistor? It's purpose
is exactly what you are looking for, masking a subcicuit as primitive device.

Regards,
Marc