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NMOS
Simple NMOS Transistor
Block Screenshot
Description
The NMos model is a simple model of a n-channel metal-oxide semiconductor FET. It differs slightly from the device used in the SPICE simulator. For more details please care for H. Spiro.
The model does not consider capacitances. A small fixed drain-source resistance is included (to avoid numerical difficulties).
| W [m] | L [m] | Beta [1/V²] | Vt [V] | K2 | K5 | DW [m] | DL[m] | |
| 12.e-6 | 4.e-6 | .062 | -4.5 | .24 | .61 | -1.2e-6 | -.9e-6 | depletion |
| 60.e-6 | 3.e-6 | .048 | .1 | .08 | .68 | -1.2e-6 | -.9e-6 | enhancement |
| 12.e-6 | 4.e-6 | .0625 | -.8 | .21 | .78 | -1.2e-6 | -.9e-6 | zero |
| 50.e-6 | 8.e-6 | .0299 | .24 | 1.144 | .7311 | -5.4e-6 | -4.e-6 | |
| 20.e-6 | 6.e-6 | .041 | .8 | 1.144 | .7311 | -2.5e-6 | -1.5e-6 | |
| 30.e-6 | 9.e-6 | .025 | -4. | .861 | .878 | -3.4e-6 | -1.74e-6 | |
| 30.e-6 | 5.e-6 | .031 | .6 | 1.5 | .72 | 0 | -3.9e-6 | |
| 50.e-6 | 6.e-6 | .0414 | -3.8 | .34 | .8 | -1.6e-6 | -2.e-6 | depletion |
| 50.e-6 | 5.e-6 | .03 | .37 | .23 | .86 | -1.6e-6 | -2.e-6 | enhancement |
| 50.e-6 | 6.e-6 | .038 | -.9 | .23 | .707 | -1.6e-6 | -2.e-6 | zero |
| 20.e-6 | 4.e-6 | .06776 | .5409 | .065 | .71 | -.8e-6 | -.2e-6 | |
| 20.e-6 | 4.e-6 | .06505 | .6209 | .065 | .71 | -.8e-6 | -.2e-6 | |
| 20.e-6 | 4.e-6 | .05365 | .6909 | .03 | .8 | -.3e-6 | -.2e-6 | |
| 20.e-6 | 4.e-6 | .05365 | .4909 | .03 | .8 | -.3e-6 | -.2e-6 | |
| 12.e-6 | 4.e-6 | .023 | -4.5 | .29 | .6 | 0 | 0 | depletion |
| 60.e-6 | 3.e-6 | .022 | .1 | .11 | .65 | 0 | 0 | enhancement |
| 12.e-6 | 4.e-6 | .038 | -.8 | .33 | .6 | 0 | 0 | zero |
| 20.e-6 | 6.e-6 | .022 | .8 | 1 | .66 | 0 | 0 |
Parameters
Width [m]
W
Properties : Type 'vec' of size 1.
Length [m]
L
Properties : Type 'vec' of size 1.
Transconductance parameter [A/(V*V)]
Beta
Properties : Type 'vec' of size 1.
Zero bias threshold voltage [V]
Vt
Properties : Type 'vec' of size 1.
Bulk threshold parameter
K2
Properties : Type 'vec' of size 1.
Reduction of pinch-off region
K5
Properties : Type 'vec' of size 1.
Narrowing of channel [m]
dW
Properties : Type 'vec' of size 1.
Shortening of channel [m]
dL
Properties : Type 'vec' of size 1.
Drain-Source-Resistance [Ohm]
RDS
Properties : Type 'vec' of size 1.
Default properties
Inputs :
Modelica variable name : 'G'
Implicit variable.
Outputs :
Modelica variable name : 'D'
Implicit variable.
Modelica variable name : 'B'
Implicit variable.
Modelica variable name : 'S'
Implicit variable.
Parameters :
Modelica parameter name : 'W'
Default value : 0.00002
Is a state variable : no.
Modelica parameter name : 'L'
Default value : 0.000006
Is a state variable : no.
Modelica parameter name : 'Beta'
Default value : 0.000041
Is a state variable : no.
Modelica parameter name : 'Vt'
Default value : 0.8
Is a state variable : no.
Modelica parameter name : 'K2'
Default value : 1.144
Is a state variable : no.
Modelica parameter name : 'K5'
Default value : 0.7311
Is a state variable : no.
Modelica parameter name : 'dW'
Default value : -0.0000025
Is a state variable : no.
Modelica parameter name : 'dL'
Default value : -0.0000015
Is a state variable : no.
Modelica parameter name : 'RDS'
Default value : 10000000
Is a state variable : no.
File name of the model : NMOS
Interfacing function
SCI/modules/scicos_blocks/macros/Electrical/NMOS.sci
Modelica model
SCI/modules/scicos_blocks/macros/Electrical/NMOS.mo
See also
- PMOS — Simple PMOS Transistor
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