modelSimpleTransistor
Simple small-signal npn-model
Information
This is a simple small signal model of a npn transistor according to the following equations:
Simplified (linearized) Shockley-equation
Ron*iB = if vBE≤Vth then 0 else (vBE - Vth)
Ebers-Moll-equation
iC = β*iBFor vCE<vBE saturation of iC is taken into account (linearly to 0).
For vCE>vBE the slope of iC is taken into account (Early voltage VY).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | beta | 200 | Transistor forward current gain |
| SI.Voltage | VY | 100 | Early voltage collector-emitter |
| SI.Voltage | Vth | 0.75 | Transistor base-emitter threshold voltage |
| SI.Resistance | rBE | 100 | Small-signal on-resistance of base-emitter junction |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Electrical.Analog.Interfaces.Pin | C | Collector | |
| Modelica.Electrical.Analog.Interfaces.Pin | B | Base | |
| Modelica.Electrical.Analog.Interfaces.Pin | E | Emitter |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Current | iB | B.i | Base current into the transistor |
| SI.Current | iC | C.i | Collector current into the transistor |
| SI.Current | iE | -E.i | Emitter current out of the transistor |
| SI.Voltage | vBE | B.v - E.v | Base-emitter voltage |
| SI.Voltage | vCE | C.v - E.v | Collector-emitter voltage |