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

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