PMOS

Simple PMOS Transistor

Block Screenshot

Contents

• `Simple PMOS Transistor`_ +

  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Modelica model
  • See also

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/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

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/modules/scicos_blocks/macros/Electrical/PMOS.sci

Modelica model

• SCI/modules/scicos_blocks/macros/Electrical/PMOS.mo

See also

• NMOS - Simple NMOS Transistor