Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

[Moved]: calculation of transconductance

Status
Not open for further replies.

arpitsrm69

Newbie level 2
Joined
May 1, 2017
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
17
sir i am using 0.35um tsmc technology.
Code:
LEVEL=7 MOBMOD=1.000e+00 CAPMOD=2.000e+00 NLEV=0
+VTO = -1.0V KP = 8U GAMMA= 0.6 LAMBDA = 0.008 PHI = 0.6
+NOIMOD=1.000e+00 K1=5.675e-01 K2=-4.39e-02 K3=4.454e+00 K3B=-8.52e-01 NCH=1.032e+17
+VTH0=-6.17e-01 VOFF=-1.13e-01 DVT0=1.482e+00 DVT1=3.884e-01 DVT2=-1.15e-02 
+KETA=-2.56e-02 PSCBE1=1.000e+09 PSCBE2=1.000e-08 DVT0W=0.000e+00 DVT1W=0.000e+00
+DVT2W=0.000e+00 UA=2.12e-10 UB=8.290e-19 UC=-5.28e-11 U0=1.296e+02 DSUB=5.000e-01
+ETA0=2.293e-01 ETAB=-3.92e-03 NFACTOR=8.237e-01 EM=4.100e+07 PCLM=2.979e+00 
+PDIBLC1=3.310e-02 PDIBLC2=1.000e-09 DROUT=5.000e-01 A0=1.423e+00 A1=0.000e+00
+A2=1.000e+00 PVAG=0.000e+00 VSAT=2.000e+05 AGS=3.482e-01 B0=2.719e-07 B1=0.000e+00
+DELTA=1.000e-02 PDIBLCB=-1.78e-02 W0=4.894e-08 DLC=4.000e-09 DWB=0.000e+00
+DWG=0.000e+00 LL=0.000e+00 LW=0.000e+00 LWL=0.000e+00 LLN=1.000e+00 LWN=1.000e+00
+WL=0.000e+00 WW=0.000e+00 WWL=0.000e+00 WLN=1.000e+00 WWN=1.000e+00 AT=3.300e+04
+UTE=-1.35e+00 KT1=-5.70e-01 KT2=2.200e02 KT1L=0.000e+00 UA1=0.000e+00 UB1=0.000e+00
+UC1=0.000e+00 PRT=0.000e+00 CGDO=7.420e-11 CGSO=7.420e-11 CGBO=1.100e-10 CGDL=1.290e-10
+CGSL=1.290e-10 CKAPPA=6.000e-01 CF=0.000e+00 ELM=5.000e+00 XPART=1.000e+00
+CLC=1.000e-15 CLE=6.000e-01 RDSW=1.853e+03 CDSC=6.994e-04 CDSCB=2.943e-04
+CDSCD=1.970e-04 PRWB=0.000e+00 PRWG=0.000e+00 CIT=1.173e-04 TOX=7.700e-9
+NGATE=0.000e+00 NLX=1.77e-07 ALPHA0=0.000e+00 BETA0=3.000e+01 AF=1.290e+00
+KF=1.090e-27 EF=1.000+00 NOIA=1.000e+20 NOIB=5.000e+04 NOIC=-1.40e-12 LINT=-8.14e-08
+WINT=3.845e-08 XJ=3.000e-07 RSH=1.560e+02 JS=2.000e-05 CJ=1.420e-03 CJSW=3.800e-10
+CBD=0.000e+00 CBS=0.000e+00 IS=0.000e+00 MJ=5.500e-01 N=1.000e+00 MJSW=3.900e-01
+PB=1.020e+00 TT=0.000e+00 PBSW=1.020e+00
how we calculate gm for mos.
 

Re: calculation of transconductance

I think you don't have to become involved in the complicated transistor models to find the transconductance of a transistor. Software can take all these parameters into account and give us the final results.
We usually use the simple square-law characteristics to have a rough approximation of the transistor operating point or we can simply use a .op simulation to find the operating point calculated by the software.
 

Re: calculation of transconductance

No matter if using simple square law or complex level7 model, you need to bias the transistor in a test circuit at the intended Id and Vds level. Some tools can annotate gm in the circuit schematic, other might require an AC source to measure gm.
 

Re: calculation of transconductance

No matter if using simple square law or complex level7 model...

Obviously the square law equation is suitable for hand calculations and can give us a rough approximation of the transistor's operating point. However, the complicated model involves several parameters, is suitable for simulations, and, naturally, leads to more accurate results.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top