modelDifferenceAmplifier

Differential amplifier
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Information

It is a simple NPN transistor amplifier circuit. The voltage difference between R1.p and R3.n is amplified. The output signal is the voltage between R2.n and R4.n. In this example the voltage at V1 is amplified because R3.n is grounded.

The simulation end time should be set to 1e- 8. Please plot the input voltage V1.v, and the output voltages R2.n.v, and R4.n.v.

Reference:
Tietze, U.; Schenk, Ch.: Halbleiter-Schaltungstechnik. Springer-Verlag Berlin Heidelberg NewYork 1980, p. 59

Main Authors:
Christoph Clauß <clauss@eas.iis.fhg.de>
André Schneider <schneider@eas.iis.fhg.de>
Fraunhofer Institute for Integrated Circuits
Design Automation Department
Zeunerstraße 38
D-01069 Dresden

Copyright:
Copyright © 1998-2002, Modelica Association and Fraunhofer-Gesellschaft.
The Modelica package is free software; it can be redistributed and/or modified under the terms of the Modelica license, see the license conditions and the accompanying disclaimer in the documentation of package Modelica in file "Modelica/package.mo".

Components

TypeNameDefaultDescription
Basic.GroundGnd1
Basic.GroundGnd2
Basic.GroundGnd3
Basic.GroundGnd4
Basic.GroundGnd5
Basic.GroundGnd6
Basic.GroundGnd7
Basic.GroundGnd8
Basic.GroundGnd9
Sources.ExpSineVoltageV1
Basic.ResistorR1
Basic.ResistorR2
Basic.ResistorR3
Basic.ResistorR4
Basic.CapacitorC1
Basic.CapacitorC2
Basic.CapacitorC3
Basic.CapacitorC4
Basic.CapacitorC5
Sources.RampVoltageV2
Sources.RampCurrentI1
Utilities.TransistorTransistor1
Utilities.TransistorTransistor2