Analog Electronic Circuits - Vol 1 | 27. Common Emitter Amplifier (contd.) (Part B) by Abraham | Learn Smarter
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Knowledge
27. Common Emitter Amplifier (contd.) (Part B)

The chapter discusses the common emitter amplifier's small signal equivalent circuit and its parameters, such as voltage gain, input resistance, and output resistance. It also addresses the challenges faced due to the emitter resistor's presence, which stabilizes the operating point but reduces gain. Solutions include using capacitors to isolate the DC operating point from AC signals, thus restoring gain while maintaining stability.

Sections

  • 27.1

    Analog Electronic Circuits

    This section focuses on the small signal equivalent circuit of a Common Emitter Amplifier and discusses its voltage gain, input resistance, and output resistance.

    Learning Practice

  • 27.1.1

    Common Emitter Amplifier (Contd.) (Part B)

    This section elaborates on the small signal equivalent circuit of the common emitter amplifier, examining its voltage gain, input, and output resistances.

    Learning Practice

  • 27.2

    Voltage Gain Of The Circuit

    This section discusses the voltage gain of a common emitter amplifier, detailing how circuit components affect gain and the significance of output and input resistances.

    Learning Practice

  • 27.2.1

    Expression Of Voltage Gain

    This section discusses the expression of voltage gain in a common emitter amplifier, including the role of resistances in determining gain and stability.

    Learning Practice

  • 27.2.2

    Parameters Of Voltage Amplifier

    This section discusses the parameters of voltage amplifiers, focusing on the common emitter amplifier, its voltage gain, input resistance, and output resistance.

    Learning Practice

  • 27.2.3

    Input Resistance And Output Resistance

    This section discusses the concepts of input and output resistance in a Common Emitter Amplifier (CE) circuit, elaborating on how these resistances affect circuit performance.

    Learning Practice

  • 27.3

    Input Resistance Analysis

    This section analyzes the input and output resistance of a common emitter amplifier and discusses the implications of the emitter resistor on gain and circuit behavior.

    Learning Practice

  • 27.3.1

    Determining Input Resistance

    This section focuses on the analysis of input resistance in common emitter amplifiers, detailing its calculations and implications on circuit performance.

    Learning Practice

  • 27.3.2

    Finding Output Resistance

    This section focuses on understanding the output resistance of a common emitter amplifier, covering how it can be calculated and its implications on amplifier design.

    Learning Practice

  • 27.4

    Impact Of Emitter Resistor On Gain

    The section discusses how the emitter resistor influences the gain of a common emitter amplifier by stabilizing the operating point while also degrading the voltage gain.

    Learning Practice

  • 27.4.1

    Gain Degradation Due To Emitter Resistor

    This section explains how emitter resistors in a common emitter amplifier affect voltage gain and operational stability.

    Learning Practice

  • 27.5

    Solutions To Gain Issues

    This section discusses solutions to issues affecting the gain of common emitter amplifiers by utilizing capacitor coupling to maintain circuit stability.

    Learning Practice

  • 27.5.1

    Use Of Capacitor For Ac Signals

    The section discusses the role of capacitors in AC circuits, particularly in amplifiers, highlighting their importance in stabilizing operating points while enabling effective signal transmission.

    Learning Practice

  • 27.5.2

    Practical Design Guidelines

    This section provides design guidelines for practical applications of common emitter amplifiers, focusing on maintaining gains while stabilizing circuit performance.

    Learning Practice

  • 27.6

    Output Resistance Analysis

    This section covers the analysis of output resistance in common emitter amplifiers, highlighting how circuit components affect gain and input/output resistance.

    Learning Practice

  • 27.6.1

    Output Resistance In Presence Of Emitter Resistor

    This section focuses on the impact of an emitter resistor on the output resistance of a common emitter amplifier and how it modifies the circuit's voltage gain and stability.

    Learning Practice

  • 27.6.2

    Voltage Gain With Emitter Resistor

    This section explores the concept of voltage gain in common emitter amplifiers, particularly focusing on the impact of the emitter resistor on gain.

    Learning Practice

  • 27.7

    Lower Cutoff Frequency Consideration

    The section discusses the impact of emitter resistor on gain and the significance of maintaining lower cutoff frequency in common emitter amplifiers.

    Learning Practice

  • 27.7.1

    Defining Lower Cutoff Frequency

    This section explores the lower cutoff frequency in analog circuits, emphasizing its relation to gain stability and the influence of coupling capacitors and resistors.

    Learning Practice

  • 27.8

    Summary Of Changes

    This section discusses the adjustments made in small signal equivalent circuits of Common Emitter Amplifiers, focusing on voltage gain, input resistance, and output resistance.

    Learning Practice

  • 27.8.1

    Changes In Input And Output Resistance

    This section discusses the significance of input and output resistance in common emitter amplifiers and their impact on voltage gain.

    Learning Practice

  • 27.8.2

    Conclusion And Next Steps

    This section discusses the implications of small signal equivalent circuits for Common Emitter Amplifiers, emphasizing the gained insights and future considerations.

    Learning Practice

References

Lecture 27.pdf

Class Notes

Memorization

What we have learnt

  • The gain of the common emit...
  • Understanding the small sig...
  • Using capacitors can help m...

Final Test

Revision Tests