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89. Numerical examples on current mirror and its applications (Part-D)

89. Numerical examples on current mirror and its applications (Part-D)

The chapter focuses on numerical examples related to current mirrors and amplifiers, emphasizing their calculations and operational characteristics. Key concepts include differential mode gain, common mode gain, and the application of current mirrors in various amplifier configurations. Various numerical examples demonstrate the principles and calculations associated with these electronic circuits.

Sections

Analog Electronic Circuits

This section discusses the functioning and applications of current mirrors in differential amplifiers, emphasizing calculations of DC and small-signal gains.

89.1 Section Overview

Start current section content and materials

Numerical Examples on Current Mirror and its applications (Part-D)

This section covers numerical examples related to current mirrors in differential amplifiers, detailing DC current calculations, differential mode, and common mode gain analyses.

89.2 Section Overview

Start current section content and materials

89.2.1 Example of Differential Amplifier with Current Mirror

This section explores the operation of a differential amplifier utilizing a current mirror, specifically focusing on DC current mirroring and the analysis of differential and common mode gains.

89.2.2 Calculation of DC Currents through Transistors

This section discusses the calculation of DC currents through transistors in a differential amplifier setup, particularly those integrated with a current mirror.

89.2.3 Calculation of Differential Mode Gain and Common Mode Gain

This section discusses the calculation of differential mode gain and common mode gain in a differential amplifier using transistors.

89.2.4 Common Mode Gain Calculation

This section focuses on calculating the common mode gain of a differential amplifier circuit, specifically its behavior with active loads like current mirrors.

Conclusion

This section encapsulates the key learning outcomes from the lecture, summarizing the concepts of current mirrors and differential amplifiers.

89.3 Section Overview

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89.3.1 Summary of Numerical Examples on Current Mirror

This section discusses numerical examples of current mirror applications in differential amplifiers, detailing DC current calculations, and differential and common mode gains.

89.3.2 Numerical Examples of Amplifiers

The section presents numerical analyses of differential amplifiers using current mirrors for biasing and signal processing.

Learning Objectives

  • Differential mode gain can be calculated using small signal models for circuit analysis.

  • Current mirrors can effectively mirror DC and signal currents, impacting amplifier performance.

  • Common mode gain is crucial for understanding the stability and noise rejection of amplifiers.

Key Concepts

Differential Mode Gain

The amplification factor for the difference in input voltages in differential amplifiers.

Common Mode Gain

The amplification factor for the common signal present at both inputs of a differential amplifier.

Current Mirror

A circuit designed to replicate a current through one active device by controlling the current through another active device, effectively mirroring the current.

Small Signal Model

An approximation used to analyze the behavior of circuits around a DC operating point under AC signal conditions.

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