I want to simulate different MOSFET charactresistics(Id-Vgs,C-V,etc) through cadence spectre. i m using PSP MOSFET Model. i have installed this model library dynamically but haveing some problems on programming part(like creating netlist for how to swap VGS & VSB ...)

Can anyone help me....

I am looking for I-V(D.C) characteristics of MOSFET model. Say example for transfer characteristic I am plotting Id ver Vgs (range is 0 to 1v) for different values of Vsb.

More problem I m suffering from is Dynamic loading of MOSFET. I am using cadence spectre professional version in which PSP MOS MODEL is not there inside the tool. So I have installed dynamically. Installation is perfect but when I was running netlist it gave error like “devise is not recognize”

Do I need to make interface which behaves like handshaking between my library to cadence?? Or I need to generate KEY or CRACK the devise model for cadence?? If I have to do this then question is what is meaning of dynamic loading??

If you could give me some pointers, it will really help

What do you mean "installation is perfect"?

Do you have a .cmiconfig file that loads the appropriate libraries?  What do you see when you type "spectre -help psp1000"?  You should get something indicating what version of the SiMKit is being loaded, and then some documentation on the model.

hey thanks  Geoffrey_Coram,
the problem is solved.. i was not including model code in netlist thats why it gave error
say for mos1100
#ahdl_include "mos11010.va"

is it possible to include 'c' code instead of verilog code in spectre netlist?

Looking forward to hearing from you...

For Id-Vd char. Of PSP, I will get some typical results ….it looks like Id-Vg char nt Id-Vd..

Here I m considering Vgs=0.7v Vsb=0.0v & I m varying Vds from 0 to 1 v and corresponding measuring drain current
Netlist ://
simulator lang=spectre

VGs (g 0) vsource type=dc dc=0.7
VDs (d 0) vsource type=dc  

M1 ( d  g  0  0 ) npsp w=10e-6 l=10e-6
model npsp psp1011 type=+1

dc1 dc dev=VD start=0 stop=1.0 lin=20

save VD:currents

when I will type spectre –f nutascii <filename> I will generate .raw data file also,

Title: // Spectre transfer char. circuit for psp1010
Date: 4:44:06 PM, Tue Aug 29, 2006
Plotname: DC Analysis `dc1': VDs:dc = (0 V -> 1 V)
Flags: real
No. Variables:        3
No. Points:       21
Variables:      0      dc      V
           1      VDs:n      A plot=0 grid=0
           2      VDs:p      A plot=0 grid=0
Values:
0      0      0      0
1      0.05      5.0000062717331e-14      -5.0000062717331e-14
2      0.1      1.0000049019495e-13      -1.0000049019495e-13
3      0.15      1.50003455393141e-13      -1.50003455393141e-13
4      0.2      2.00024022330751e-13      -2.00024022330751e-13
5      0.25      2.50166540052325e-13      -2.50166540052325e-13
6      0.3      3.01152020978476e-13      -3.01152020978476e-13
7      0.35      3.5796590224208e-13      -3.5796590224208e-13
8      0.4      4.55057471006125e-13      -4.55057471006125e-13
9      0.45      8.30365196150691e-13      -8.30365196150691e-13
10      0.5      3.12644373269282e-12      -3.12644373269282e-12
11      0.55      1.86746180781748e-11      -1.86746180781748e-11
12      0.6      1.25567730061252e-10      -1.25567730061252e-9
13      0.65      8.6099747370198e-10      -8.6099747370198e-10
14      0.7      5.89935901098427e-09      -5.89935901098427e-09
15      0.75      3.97065948524656e-08      -3.97065948524656e-08
16      0.8      2.44109423589462e-07      -2.44109423589462e-07
17      0.85      1.12858076768285e-06      -1.12858076768285e-06
18      0.9      3.4322256987129e-06      -3.4322256987129e-06
19      0.95      7.14847075844511e-06      -7.14847075844511e-06
20      1      1.17955670880355e-05      -1.17955670880355e-05

i think Datas are comming wrong..Can u suggest me where I m doing wrong???

Really Thanks a lot for your time and consideration.

If I am not mistaken then

psp1010 is for global geometry scaling
psp1011 is for global binning scaling
psp1010e is for local scalling

As I am working with parameter extraction of PSP mos model using Genetic Algorithms and (Variations). For my first stage, I am considering only global geometrical model because I am interested in data coming from global geometrical parameters only.

Can u suggest me is there problem in model itself or somewhere I am doing wrong??

Geoffrey_Coram wrote on Aug 30^th, 2006, 6:56am:


For some reason, "type=+1" selects a PMOS device, I believe.  I think the help for the device says to use n or p, so +1 is not really supported.  This is unrelated to your choice of scaling rules.