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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/ModElectrical/PMOS.sci [view code]

Modelica model

• SCI/macros/scicos_blocks/ModElectrical/Electrical.mo [view code]

See also

• NMOS - Simple NMOS Transistor (Scicos Block)

Authors

www.modelica.org