when i tried to make post-simulation using specte simulator with the extracted view (produced in DIVA), i got some errors in the spectre.out :
Error found by spectre in `stage1_rfpdk_sym_fordiva_extracted', during circuit
       read-in.
   input.scs: +8 is an instance of an undefined model dnwpw.
   input.scs: +7 is an instance of an undefined model dnwpw.
   input.scs: +6 is an instance of an undefined model dnwpw.
   input.scs: +5 is an instance of an undefined model dnwpw.
   input.scs: +4 is an instance of an undefined model dnwpw.
   input.scs: +3 is an instance of an undefined model dnwpw.
   input.scs: +2 is an instance of an undefined model dnwpw.

at the same time, here is the relative message in the input.scs :
   \+8 (IN VDD) dnwpw area=5.02139e-10 pj=0.00010794 m=1
   \+7 (GND VDD) dnwpw area=9.01648e-11 pj=3.902e-05 m=1
   \+6 (GND VDD) dnwpw area=5.6673e-10 pj=0.00025188 m=1
   \+5 (GND VDD) dnwpw area=2.5659e-10 pj=0.00011404 m=1
   \+4 (GND VDD) dnwpw area=1e-20 pj=1e-20 m=1
   \+3 (GND VDD) dnwpw area=1e-20 pj=1e-20 m=1
   \+2 (GND _7) dnwpw area=1e-20 pj=1e-20 m=1

what does dnwpw mean?
how to solve this problem?

thank you.

Hi,

I remember having an error like that before. I think dnwpw is a parasitic diode. You should find your diode model file and see if it has the same name. If the name is slightly different then it won't be recognized.

cheers,
Aaron

Hi,

maybe you could make a copy of that model file, and rename the model dnwpw. Then in the analog design environment, use the modified model file for diodes...

that's assuming they are one and the same...

Aaron