Types of JFET
There are two types of JFETs:
- N- channel JFET
- P- channel JFET
N- Channel Junction Field Effect Transistor
The n-channel junction field effect transistor is a semiconductor device that has three terminals: gate, source, and drain. It is made up of an N-type semiconductor thin bar material. The majority of charge carriers for n-type are electrons. This forms a channel between source and drain. When a negative voltage is applied to the gate terminal, it creates an electric field across the insulating material between the gate and the channel.
Whenever a negative voltage in the gate increases, the electric field also increases, narrowing the channel and decreasing the current flow between the source and drain. To control the flow of electrons and to be used in applications such as voltage regulator, impedance switches, etc., the high input of this n channel JFET can be used.
P -Channel Junction Field Effect Transistor
The p-channel junction field effect transistor is a semiconductor device that has three terminals: gate, source, and drain. It is made up of a semiconductor p-type thin bar material, The majority of carriers are holes in the p type. This forms a channel between source and drain.
When a positive voltage is applied to the gate terminal, it creates an electric field across the insulating material between the gate and the channel. Whenever a positive voltage in the gate increases, the electric field also increases, narrowing the channel and decreasing the current flow between the source and drain. In applications such as amplifiers, switches, and signal processing, the high input of this p channel impedance JFET can be used to control the flow of holes.
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