The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> Circuit Simulators >> Problem with " assert " in Spectre
https://designers-guide.org/forum/YaBB.pl?num=1159171986

Message started by AnalogAroma on Sep 25^th, 2006, 1:13am

Title: Problem with " assert " in Spectre
Post by AnalogAroma on Sep 25^th, 2006, 1:13am

Hi All,

We have tried to use assert statements to get additional warnings about the operationg region of a SiGe HBT. Well as shown below , the assert statement does not work if an expression is used. Is there any work-around for this ?

########################
inline subckt npnA c b e bn
parameters Nx=1
+ icmax=Nx*0.0025
* cannot refer to Nx or icmax in the assert statement

npnA (c b e bn) npnA_vbic
* works with fixed values:
* warnImax assert max=2*0.0025 min=-0.0025 duration=0 dev="npnA" param=ic message="Warning: collector current range exceeded" level=warning

*doesnt work with expression - no error msg, but won't flag a violation
* warnImax assert max=Nx*0.0025 min=-icmax duration=0 expr=(npnA:ic) message="Warning: collector current range exceeded" level=warning

model npnA_vbic vbic
...
ends npnA

#####################################

With Regards,

Analog Aroma