tejashrimane
Newbie level 2
hello i am working cntfet i want to investigate efeect of diiferent temperature on drain current but when i change temperature there is no effect on its same for all temp
i am using standford university model of cntfet.
this is the netlist where i change temp
can any one help me out.
i am using standford university model of cntfet.
Code:
********************************************************************
* Carbon Nanotube Field Effect Transistors
* HSPICE Model
* Version 2.2.1
*
*
* Copyright The Board Trustees of the Leland Stanford Junior University 2009
* Albert Lin, Gordon Wan, Jie Deng, Prof. H-S Philip Wong
* All Rights Reserved.
*
* 09/09/2008 Last Modified by Albert Lin.
*
* Carbon Nanotube Field Effect Transistors Verilog-A implementation
* based on
* "A Circuit-Compatible SPICE model for Enhancement Mode Carbon
* Nanotube Field Effect Transistors" by Jie Deng and H-S Philip Wong
*
* Patent Pending.
*
* File name: cnfet_sample.sp
********************************************************************
********************************************************************
* LICENSE AGREEMENT
* Stanford Leland Junior University and the authors ("Stanford")
* provide these model files to you subject to the License Agreement,
* which may be updated by us from time to time without notice to you.
* The most-up-to-date License Agreement can be found at
* **broken link removed**
********************************************************************
***************************************************
*
*Sample HSPICE Deck
*
***************************************************
.TITLE 'IDS vs VGS for CNFET'
***************************************************
*For optimal accuracy, convergence, and runtime
***************************************************
.options POST
.options AUTOSTOP
.options INGOLD=2 DCON=1
.options GSHUNT=1e-12 RMIN=1e-15
.options ABSTOL=1e-5 ABSVDC=1e-4
.options RELTOL=1e-2 RELVDC=1e-2
.options NUMDGT=4 PIVOT=13
.param TEMP=27
***************************************************
***************************************************
*Include relevant model files
***************************************************
.lib 'CNFET.lib' CNFET
***************************************************
***************************************************
*Beginning of circuit and device definitions
***************************************************
*Supplies and voltage params:
.param Supply=0.9
.param Vg='Supply'
.param Vd='Supply'
*Some CNFET parameters:
.param Ccsd=0 CoupleRatio=0
.param m_cnt=1 Efo=0.6
.param Wg=0 Cb=40e-12
.param Lg=32e-9 Lgef=100e-9
.param Vfn=0 Vfp=0
.param m=19 n=0
.param Hox=4e-9 Kox=16
***********************************************************************
* Define power supply
***********************************************************************
Vdd Drain Gnd Vd
Vss Source Gnd 0
Vgg Gate Gnd Vg
Vsub Sub Gnd 0
***********************************************************************
* Main Circuits
***********************************************************************
* nFET
XCNT Drain Gate Source Sub NCNFET Lch=Lg Lgeff='Lgef' Lss=32e-9 Ldd=32e-9
+ Kgate='Kox' Tox='Hox' Csub='Cb' Vfbn='Vfn' Dout=0 Sout=0 Pitch=20e-9 n1=m n2=n tubes=3
* pFET
*XCNT Drain Gate Source Sub PCNFET Lch=Lg Lgeff='Lgef' Lss=32e-9 Ldd=32e-9
*+ Kgate='Kox' Tox='Hox' Csub='Cb' Vfbp='Vfp' Dout=0 Sout=0 Pitch=20e-9 n1=m n2=n tubes=3
* nFET uniform-tubes model
*XCNT Drain Gate Source Sub NCNFET_uniform Lch=Lg Lgeff='Lgef' Lss=32e-9 Ldd=32e-9
*+ Kgate='Kox' Tox='Hox' Csub='Cb' Vfbn='Vfn' Dout=0 Sout=0 Pitch=20e-9 n1=m n2=n CNTPos=1 tubes=3
* pFET uniform-tubes model
*XCNT Drain Gate Source Sub PCNFET_uniform Lch=Lg Lgeff='Lgef' Lss=32e-9 Ldd=32e-9
*+ Kgate='Kox' Tox='Hox' Csub='Cb' Vfbp='Vfp' Dout=0 Sout=0 Pitch=20e-9 n1=m n2=n CNTPOS=0 tubes=3
***********************************************************************
* Measurements
***********************************************************************
* test nFETs, Ids vs. Vgs
.DC Vgg START=0 STOP='Supply' STEP='0.3*Supply'
+ SWEEP Vdd START=0 STOP='Supply' STEP='0.3*Supply'
.temp 100 150 200
* test pFETs, Ids vs. Vgs
*.DC Vgg START=0 STOP='-Supply' STEP='-0.01*Supply'
*+ SWEEP Vdd START=0 STOP='-Supply' STEP='-0.1*Supply'
***********************************************************************
.print I(Vdd)
.end
can any one help me out.
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