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79. Differential Amplifier : Analysis and Numerical Examples (Contd.)

79. Differential Amplifier : Analysis and Numerical Examples (Contd.)

The chapter provides a comprehensive analysis of differential amplifiers, particularly focusing on numerical examples involving BJTs and MOSFETs. It covers the key aspects including DC operating points, small signal parameters, differential mode gain, and common mode gain. Practical examples illustrate how performance can be optimized in differential amplifiers.

Sections

Analog Electronic Circuits

This section continues the discussion on differential amplifiers, focusing on analysis through numerical examples.

79.1 Section Overview

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79.1.1 Differential Amplifier: Analysis and Numerical Examples (Contd.)

This section covers the analysis of differential amplifiers using numerical examples, focusing on BJTs and MOSFETs, while examining small-signal parameters and output swing.

Differential Amplifier using BJT

This section elaborates on the analysis and practical applications of differential amplifiers using BJTs.

79.2 Section Overview

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79.2.1 DC Operating Point and Small Signal Parameters

This section discusses the DC operating points and small signal parameters of differential amplifiers, particularly focusing on BJTs and MOSFETs.

79.2.2 Differential and Common Mode Gain

This section explores the analysis and numerical examples of differential amplifiers, focusing on differential mode gain and common mode gain.

79.2.3 Signal Processing and Output Calculation

This section covers the analysis and numerical examples related to differential amplifiers using BJT and MOSFET, focusing on their operating points, output swing, and small-signal parameters.

79.2.4 Performance Enhancement by Active Device

This section discusses the enhancement of differential amplifier performance by substituting passive components with active devices.

Example Circuit Analysis

This section focuses on the numerical analysis of differential amplifiers using BJTs and MOSFETs, exploring circuit parameters and enhancing performance through active devices.

79.3 Section Overview

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79.3.1 Analysis of Current and Voltage Levels

The section focuses on the analysis of differential amplifiers' current and voltage levels, exploring key performance parameters.

79.3.2 Output Swing and Operating Point Summary

This section discusses the output swing and operating points of differential amplifiers, focusing on BJTs and MOSFETs.

Extended Analysis with Split Resistors

This section covers the detailed analysis of differential amplifiers using BJTs and MOSFETs with an emphasis on split resistors.

79.4 Section Overview

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79.4.1 Impact of Resistor Splitting on Signal Propagation

This section discusses the role of resistor splitting in a differential amplifier's performance, focusing on signal propagation dynamics.

79.4.2 Voltage Gain and Output Signal Justification

This section discusses the voltage gain and output signal justification for differential amplifiers, including their DC operating points and signal characteristics.

Conclusion and Laboratory Experiments

This section delves into the final analysis of differential amplifiers, providing insights through numerical examples and discussing the practical application in laboratory experiments.

79.5 Section Overview

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79.5.1 Expected Output Behavior in Real World Application

This section discusses the practical application of differential amplifiers, including their analysis and performance considerations.

79.5.2 Investigation of Input Common Mode Voltage Range

This section explores the common mode voltage range in differential amplifiers, focusing on the significance of the input levels that keep the transistors in their active region while avoiding saturation.

Learning Objectives

  • The analysis of differential amplifiers using BJTs and MOSFETs involves detailed considerations of operating points and gain characteristics.

  • Understanding the distinction between differential mode and common mode signals is crucial for improving amplifier performance.

  • Utilizing active components can significantly enhance the performance of differential amplifiers.

Key Concepts

Differential Amplifier

A circuit that amplifies the difference between two input signals while rejecting any signals that are common to both inputs.

DC Operating Point

The point at which the transistor operates in its active region, determined by the biasing of the junctions.

Common Mode Gain

The gain of the amplifier for signals that are common to both inputs.

Differential Mode Gain

The gain of the amplifier for signals that are different between the two inputs.

Practice Exercises

Total Questions

2

Estimated Time

4 min

Passing Score

70%

Instructions

  • Read each question carefully
  • You can use hints if you need help
  • Complete all questions before submitting