NPN

Scicos Block
fr - eng

##
NPN transistor

### Contents

- NPN transistor
  - Palette
  - Description
  - Dialog box
  - Default properties
  - Interfacing function
  - Modelica model
  - See also
  - Authors

### Palette

- Electrical.cosf - Electrical toolbox

### Description

This model is a simple model of a bipolar NPN junction transistor according to Ebers-Moll.

### Dialog box

Parameter | Default value | Description
Bf | 50 | Forward beta
Br | 0.1 | Reverse beta
Is | 1.e-16 | Transport saturation current [A]
Vak | 0.02 | Early voltage (inverse), 1/Volt [1/V]
Tauf | 0.12e-9 | Ideal forward transit time [s]
Taur | 5e-9 | Ideal reverse transit time [s]
Ccs | 1e-12 | Collector-substrat(ground) cap. [F]
Cje | 0.4e-12 | Base-emitter zero bias depletion cap. [F]
Cjc | 0.5e-12 | Base-coll. zero bias depletion cap. [F]
Phie | 0.8 | Base-emitter diffusion voltage [V]
Me | 0.4 | Base-emitter gradation exponent
Phic | 0.8 | Base-collector diffusion voltage [V]
Mc | 0.333 | Base-collector gradation exponent
Gbc | 1e-15 | Base-collector conductance [S]
Gbe | 1e-15 | Base-emitter conductance [S]
Vt | 0.02585 | Voltage equivalent of temperature [V]
EMin | -100 | if x < EMin, the exp(x) function is linearized
EMax | 40 | if x > EMax, the exp(x) function is linearized

### Default properties

- Inputs :
  - Modelica variable name : 'B'
    Implicit variable.

- Outputs :
  - Modelica variable name : 'C'
    Implicit variable.

  - Modelica variable name : 'E'
    Implicit variable.

- Parameters :
  - Modelica parameter name : 'Bf'
    Default value : 50
    Is a state variable : no.

  - Modelica parameter name : 'Br'
    Default value : 0.1
    Is a state variable : no.

  - Modelica parameter name : 'Is'
    Default value : 0
    Is a state variable : no.

  - Modelica parameter name : 'Vak'
    Default value : 0.02
    Is a state variable : no.

  - Modelica parameter name : 'Tauf'
    Default value : 1.200E-10
    Is a state variable : no.

  - Modelica parameter name : 'Taur'
    Default value : 5.000E-09
    Is a state variable : no.

  - Modelica parameter name : 'Ccs'
    Default value : 1.000E-12
    Is a state variable : no.

  - Modelica parameter name : 'Cje'
    Default value : 4.000E-13
    Is a state variable : no.

  - Modelica parameter name : 'Cjc'
    Default value : 5.000E-13
    Is a state variable : no.

  - Modelica parameter name : 'Phie'
    Default value : 0.8
    Is a state variable : no.

  - Modelica parameter name : 'Me'
    Default value : 0.4
    Is a state variable : no.

  - Modelica parameter name : 'Phic'
    Default value : 0.8
    Is a state variable : no.

  - Modelica parameter name : 'Mc'
    Default value : 0.333
    Is a state variable : no.

  - Modelica parameter name : 'Gbc'
    Default value : 1.000E-15
    Is a state variable : no.

  - Modelica parameter name : 'Gbe'
    Default value : 1.000E-15
    Is a state variable : no.

  - Modelica parameter name : 'Vt'
    Default value : 0.02585
    Is a state variable : no.

  - Modelica parameter name : 'EMinMax'
    Default value : 40
    Is a state variable : no.

- File name of the model : NPN

### Interfacing function

- SCI/macros/scicos_blocks/Electrical/NPN.sci [view code]

### Modelica model

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

### See also

- PNP - PNP transistor (Scicos Block)

### Authors

www.modelica.org