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Importing FinFET models from hspice

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V.Singh

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I'm trying to simulate a basic 2 input nand gate using cmos and finfet but i'm currently facing problems in importing the model files.T he model files are from (ptm.asu.edu) .I tried to call the library so that it can automatically calculate vdd and fin thickness from the param.inc file. All the model files and code files are in the same directory.


Code: 
*********************PTM Model*************

.include '32nm_bsim4.txt'
.include 'param.inc'
.lib ptm20lstp
***************parameters *****************

.param  Wn = 64n    
+       Wp = 160n   
+     Lmin = 32n    $ Technology node
+     Vmax = 0.9V   $ Nominal Voltage
+     Vmin = 0.0V


****** Supply Voltages *********************

vSupply vdd 0 Vmax
vGround vss 0 Vmin
.global vdd
.global vss
.global clk
************** Modules **********************

.subckt NOT A Abar
MPN1   Abar  A  Vdd  Vdd  PMOS  W=wp  L=Lmin
MNN1   Abar  A  vss  Vss  NMOS  W=wn  L=Lmin
.ends

.subckt NAND in1 in2 out
MPN1   out  in1  Vdd  Vdd  PMOS  W=wp  L=Lmin
MPN2   out  in2  Vdd  Vdd  PMOS  W=wp  L=Lmin
MNN1   out  in1  n001 Vss  NMOS  W=wn  L=Lmin
MNN2   N001 in2  vss  Vss  NMOS  W=wn  L=Lmin
.ends

.subckt NAND_finfet A B  out
XM1 out A N001 vss nfet 
XM2 N001 B vss vss nfet 
XM3 out vss Vdd Vdd pfet   
.ends NAND_finfet
 

V.Singh said:
... automatically calculate vdd and fin thickness from the param.inc file.
Click to expand...

These two parameters aren't calculated - they will be given by parameter statements. The fin thickness can't be changed, it's fixed in the model file(s). vdd sometimes is fixed in a subcircuit file, if not, this parameter has to be stated by the user.
 

erikl said:
These two parameters aren't calculated - they will be given by parameter statements. The fin thickness can't be changed, it's fixed in the model file(s). vdd sometimes is fixed in a subcircuit file, if not, this parameter has to be stated by the user.
Click to expand...

do i have to define another vdd for finfet ? do i need to include .pm files for nfet and pfet in the code? Aren't .pm files automatically imported from the .inc file ?
 

V.Singh said:
do i have to define another vdd for finfet ?
Click to expand...
I can't find any vdd definition statement in your above code (if it isn't defined in your param.inc file - I don't have it). Just its instantiations are declared.

V.Singh said:
do i need to include .pm files for nfet and pfet in the code?
Click to expand...
I think so.

V.Singh said:
Aren't .pm files automatically imported from the .inc file ?
Click to expand...
If it contains the appropriate .include statements - sure.
 
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