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geeeeo
(Stranger )
09/22/07 01:19 PM
cannot understand hspice warning Report this article as Inappropriate to us !!!Login to Reply

Hello

 

----> I simulate the following netlist on HSPICE 2002.2.2 and I receive the following warning in the .lis file created:

 ** Warning**: The parameter  tox      will be ignored

--->The netlist is the following:

 

*************************** netlist start *************************

 *Copyright (C) 2006-2007 UTH/ELAB.
* All rights reserved.

.title c17.sp
.include '090.nmos'
.include '090.pmos'


v1 1 0 pulse(0 5 15n)
v2 2 0 pulse(0 5 15n)
v3 3 0 pulse(0 5 15n)
v6 6 0 pulse(0 5 15n)
v7 7 0 pulse(0 5 15n)


.print tran v(22)
.print tran v(23)
vdd  9999 0 dc 5v

.subckt nand2 3 1 2 9999 l1=0.06u wp=0.490905u wn=0.15u tox1=0.0025u
m1 3 1  9999 9999 gpdk090_pmos1v l=l1 w=wp as=0.0294543p ad=0.0294543p ps=1.10181u pd=1.10181u Tox=tox1
m3 3 2  9999 9999 gpdk090_pmos1v l=l1 w=wp as=0.0294543p ad=0.0294543p ps=1.10181u pd=1.10181u Tox=tox1
m2 3 1   4  0 gpdk090_nmos1v l=l1 w=wn as=0.09p ad=0.09p ps=0.42u pd=0.42u Tox=tox1
m4 4 2   0  0 gpdk090_nmos1v l=l1 w=wn as=0.09p ad=0.09p ps=0.42u pd=0.42u Tox=tox1
.ends nand2



x10 10 1 3 9999 nand2
x11 11 3 6 9999 nand2 l1=6.0531939e-008 tox1 = 2.5136211e-009
x16 16 2 11 9999 nand2 l1=6.1747769e-008 tox1 = 2.4654036e-009
x19 19 11 7 9999 nand2 l1=5.9096046e-008 tox1 = 2.5380340e-009
x22 22 10 16 9999 nand2 l1=5.9218558e-008 tox1 = 2.4408750e-009
x23 23 16 19 9999 nand2 l1=6.2201563e-008 tox1 = 2.3806757e-009

.end


*************************** end of netlist ************************

 

----> As MOS model I use the following (Briefly speaking I write only the NMOS model):

 

********************** start of model card **************************
*
* Predictive Technology Model Beta Version
* 90nm NMOS SPICE Parametersv (normal one)
*

.model  gpdk090_nmos1v nmos
+Level = 49

+Lint = 1.5e-08 Tox = 2.5e-09
+Vth0 = 0.2607 Rdsw = 180

+lmin=1.0e-7 lmax=1.0e-7 wmin=1.0e-7 wmax=1.0e-4
+Tref=27.0   version =3.1
+Xj= 4.0000000E-08       Nch= 9.7000000E+17
+lln= 1.0000000          lwn= 1.0000000              wln= 0.00
+wwn= 0.00               ll= 0.00


... {The rest of the model card is ommited}

 ********************* end of model card ***************************

 

 

----> What I suppose is that the MOS model I use does not permit the instantiation of parameter Tox in the netlist.

 

---> If I change the model is there a chance that the warning won't be displayed?

---> Only L, W, as, ad, ps, pd MOS parameters can be instantiated in the netlist with values that are different from the ones in the model card???

Thank you for the time you have spent viewing my post

I would be thankful if you proposed me a solution   

 






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