Lecture 3
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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.

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Lecture 3

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Lecture 3

Lecture 3

Section 2.5

Dependent Sources


Characteristics

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

Dependent Sources


Bjt example 2

BJT Example (2)

Class: ES231

Circuit: Audio amplifier


Bjt example 21

BJT Example (2)

A BJT can be modeled by a voltage

Controlled current source.

Bipolar Junction Transistor=BJT


A simple voltage amplifier

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.

Assign Io

Apply KCL

Determine the Vout/V1


Example 1

Example 1

Find vo


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