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NPN

NPN transistor

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Contents

Description

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

Parameters

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

Interfacing function

Modelica model

See also


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