Electronic Devices 2 | 3. Junction Field Effect Transistors (JFETs) by Pavan | Learn Smarter
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge
3. Junction Field Effect Transistors (JFETs)

The Junction Field Effect Transistor (JFET) is a voltage-controlled unipolar device primarily used for amplifying or switching signals. Unlike bipolar junction transistors (BJTs), JFETs rely on gate voltage to control the drain current. This chapter explains the construction, working principles, biasing, and characteristics of JFETs, along with their applications, advantages, and disadvantages.

Sections

  • 3

    Junction Field Effect Transistors (Jfets)

    Junction Field Effect Transistors (JFETs) are unipolar devices controlled by voltage, used primarily for amplifying or switching electrical signals.

    Learning Practice

  • 3.1

    Introduction To Jfet

    A Junction Field Effect Transistor (JFET) is a voltage-controlled unipolar device primarily used for amplifying or switching signals.

    Learning Practice

  • 3.2

    Construction Of Jfet

    The construction of a Junction Field Effect Transistor (JFET) includes two main types: n-channel and p-channel, detailing their respective materials and terminal functions.

    Learning Practice

  • 3.3

    Working Principle Of Jfet

    This section details the operational principles of the Junction Field Effect Transistor (JFET), emphasizing the role of the gate-source junction and the significance of pinch-off voltage in controlling drain current.

    Learning Practice

  • 3.4

    Jfet Biasing And Operating Regions

    This section describes the biasing conditions and operational behavior of JFETs in three distinct regions.

    Learning Practice

  • 3.5

    Jfet Characteristics

    JFET characteristics describe how the device behaves under different operating conditions using output and transfer curves.

    Learning Practice

  • 3.6

    Parameters Of Jfet

    The parameters of the Junction Field Effect Transistor (JFET) define its electrical characteristics and operational behavior.

    Learning Practice

  • 3.7

    Comparison: Jfet Vs Bjt

    This section compares Junction Field Effect Transistors (JFETs) and Bipolar Junction Transistors (BJTs) across various features.

    Learning Practice

  • 3.8

    Applications Of Jfet

    The JFET is used in various applications due to its voltage control capabilities, high input impedance, and low power consumption.

    Learning Practice

  • 3.9

    Advantages And Disadvantages

    This section discusses the benefits and drawbacks of Junction Field Effect Transistors (JFETs), highlighting key features such as input impedance and power consumption.

    Learning Practice

  • 3.10

    Summary Of Key Concepts

    The JFET is a voltage-controlled, unipolar device that operates in three distinct regions: Ohmic, Active, and Cut-off.

    Learning Practice

References

ee4-ed2-3.pdf

Class Notes

Memorization

What we have learnt

  • JFET is a voltage-controlle...
  • It operates in three region...
  • Gate voltage controls curre...

Final Test

Revision Tests