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PMOS
Simple PMOS Transistor
Block Screenshot
Description
The PMOS model is a simple model of a p-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).
Some typical parameter sets are:
| W [m] | L[m] | Beta [1/V²] | Vt [V] | K2 | K5 | DW [m] | DL [m] |
| 50.e-6 | 8.e-6 | .0085 | -.15 | .41 | .839 | -3.8e-6 | -4.0e-6 |
| 20.e-6 | 6.e-6 | .0105 | -1.0 | .41 | .839 | -2.5e-6 | -2.1e-6 |
| 30.e-6 | 5.e-6 | .0059 | -.3 | .98 | 1.01 | 0 | -3.9e-6 |
| 30.e-6 | 5.e-6 | .0152 | -.69 | .104 | 1.1 | -.8e-6 | -.4e-6 |
| 30.e-6 | 5.e-6 | .0163 | -.69 | .104 | 1.1 | -.8e-6 | -.4e-6 |
| 30.e-6 | 5.e-6 | .0182 | -.69 | .086 | 1.06 | -.1e-6 | -.6e-6 |
| 20.e-6 | 6.e-6 | .0074 | -1. | .4 | .59 | 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 : 0.00005
Is a state variable : no.
Modelica parameter name : 'L'
Default value : 0.000006
Is a state variable : no.
Modelica parameter name : 'Beta'
Default value : 0.0000105
Is a state variable : no.
Modelica parameter name : 'Vt'
Default value : -1
Is a state variable : no.
Modelica parameter name : 'K2'
Default value : 0.41
Is a state variable : no.
Modelica parameter name : 'K5'
Default value : 0.839
Is a state variable : no.
Modelica parameter name : 'dW'
Default value : -0.0000025
Is a state variable : no.
Modelica parameter name : 'dL'
Default value : -0.0000021
Is a state variable : no.
Modelica parameter name : 'RDS'
Default value : 10000000
Is a state variable : no.
File name of the model : PMOS
Interfacing function
SCI/modules/scicos_blocks/macros/Electrical/PMOS.sci
Modelica model
SCI/modules/scicos_blocks/macros/Electrical/PMOS.mo
See also
- NMOS — Simple NMOS Transistor
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