Construction of Junction Field Effect Transistor (JFET)
The junction field effect transistor is a three-terminal semiconductor device that mainly consists of a thin bar of semiconductor material. The material may be silicon or gallium arsenide. The construction of a junction field effect transistor can create a channel in the semiconductor material that acts as a way for the flow of charge carriers. In n-channel JFET, the semiconductor material is n-type, which is doped with impurities. In p-channel JFET, the semiconductor material is p-type with impurities of Holes. The source and drain terminals are known as the two ends of the silicon material, while the third terminal is a gate. The flow of charge carriers is from source to drain, but it does not touch the channel. The gate terminal is separated by a thin insulating layer. The gate triggers this entire circuit, which can control the flow of charge carriers from source to drain.
Junction Field Effect Transistor or JFET
In electronics, the junction field effect transistor is a fundamental component, operating on the principle of electric field control. It is a three-terminal device, and it consists of the gate, drain, and source terminals.
There are two types of JFETs: N-channel JFET and P-channel JFET. The N channel JFET controls the flow of current through electrons, while the P channel JFET depends on the movement of the holes where the electrons are absent. The gate terminal plays a major role in conducting current and controls the electron flow from source to drain. JFETs are also useful in switching circuits because they can be used as voltage-controlled resistors.
In this article, we will learn about what is JFET and key terminologies, construction and working of JFET and types of JFET, features, and characteristics, applications of junction field effect transistors in detail.
Table of Content
- What is JFET?
- Key terminologies
- Construction
- Working
- Types of JFET
- Characteristics
- Applications