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81. Current mirror circuits (Part-A) - B

81. Current mirror circuits (Part-A) - B

The chapter explores the concept of current mirrors, focusing on how they can generate reference currents in electronic circuits. It discusses both the MOSFET and BJT versions of current mirrors and highlights their similarities. Additionally, the chapter addresses the characteristics of these circuits and sets the stage for further analytical discussions.

Sections

Current Reference and Mirrors

This section describes the significance of current references and mirrors in circuitry, focusing on their functionality and the ability to generate multiple current references from a single original reference.

81.1 Section Overview

Start current section content and materials

81.1.1 Introduction to Current References

This section introduces current references and explains how they can be generated using current mirrors in circuits.

81.1.2 Current Mirror Analysis

This section discusses how current mirrors utilize similar transistors to create multiple current references from a single source.

81.1.3 MOSFET Current Mirror

The section discusses the MOSFET current mirror circuit and its functionality in generating multiple current references from a single reference current.

81.1.4 BJT Counterpart of Current Mirror

This section introduces the concept of a BJT current mirror, discussing its similarities to MOSFET current mirrors and the advantages of creating reference currents from a single source.

81.1.5 Basic Characteristics of the Circuit

This section discusses the characteristics of current mirrors in circuits, emphasizing their ability to generate multi-references of current.

Discussion and Analysis

This section discusses the concept of current mirrors using MOSFET and BJT technologies to generate multiple current references from a single reference current.

81.2 Section Overview

Start current section content and materials

81.2.1 Overview of Circuit Analysis

This section provides an overview of circuit analysis, focusing on current references and current mirrors, specifically through MOSFETs and BJTs.

Learning Objectives

  • Current mirrors are essential for generating multiple references from a single current reference.

  • The MOSFET version of a current mirror operates similarly to its BJT counterpart.

  • Understanding the characteristics of current mirrors is crucial for effective circuit design.

Key Concepts

Current Mirror

A circuit that copies the current from one branch to another, maintaining the same current flow.

MOSFET

A type of transistor used for switching or amplifying signals in electrical circuits.

BJT

Bipolar Junction Transistor, a type of transistor that uses both electron and hole charge carriers.

Reference Current

A stable current used as a basis for other current values in electronic circuits.

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