Lecture 3 Section 2.5 Dependent Sources. Characteristics Dependent sources establish a voltage or current whose value depends on the value of a voltage.

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Lecture 3 Section 2.5 Dependent Sources

Characteristics Dependent sources establish a voltage or current whose value depends on the value of a voltage or current else where in the circuit. You cannot specify the value of a dependent source unless you know the value of the voltage or current on which it depends.

Dependent Sources

BJT Example (2) Class: ES231 Circuit: Audio amplifier

BJT Example (2) Bipolar Junction Transistor=BJT A BJT can be modeled by a voltage Controlled current source.

A Simple Voltage Amplifier You will learn how to represent the amplifier using its small signal model. Let’s concentrate on the small signal model for now. 1.Assign Io 2.Apply KCL 3.Determine the Vout/V1

Example 1 Find v o