Scicos Block
fr - eng

##
Simple PMOS Transistor

### Contents

- Simple PMOS Transistor
  - Palette
  - Description
  - Dialog box
  - Default properties
  - Interfacing function
  - Modelica model
  - See also
  - Authors

### Palette

- Electrical.cosf - Electrical toolbox

### 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/Vē] | 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

### Dialog box

- 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/macros/scicos_blocks/Electrical/PMOS.sci [view code]

### Modelica model

- SCI/macros/scicos_blocks/Electrical/PMOS.mo [view code]

### See also

- NMOS - Simple NMOS Transistor (Scicos Block)

### Authors

www.modelica.org