Working of FET Transistor
It has 3 terminals: gate, drain, and source. The working principle is as per the following:
To allow electrons or holes to flow between the source and drain terminals, they are doped with material of the n-type or p-type variety.
An electric field is created in the channel area between the source and drain when a voltage is applied to the gate terminal. This electric field modulates the conductivity of the channel, behaving like a “valve” that controls the current flow between the source and drain. For an n-channel FET, applying a positive voltage to the gate attracts free electrons into the channel, increasing its conductivity and allowing more current to flow between the source and drain. For a p-channel FET, a negative voltage on the gate repulses holes, expanding conductivity.
By changing the gate voltage, the conductivity and current flow through the channel can be finely controlled. This permits FETs to be utilized as electronic switches and in amplifying circuits. The electric field effect gives a high input impedance and low noise performance, making FETs valuable in RF applications and as sensitive analog signal amplifiers.
FET Transistor
Field Effect Transistor (FET) is a crucial electronic component. We are surrounded by numerous electronic devices all around, and now everything is just a click away from us. We went from desktop computers to supercomputers as technology advanced, and during this long journey, a transistor, an electronic component, played a significant role in this evolution. As of now, field-effect transistors, or FET transistors, are widely used transistors, providing the main active component in many integrated circuits. It has several advantages – less power consumption, and high input impedance, which is used in many devices to operate. In this article, we will study in detail about FET Transistor.
Table of Content
- What is FET?
- Working
- Types
- JFET
- MOSFET
- FET Amplifiers
- Characteristics of FET
- FET switching circuits
- Applications
- Comparison between FET and BJT
Field-Effect Transistor (FET) is a semiconductor device that consists of a channel made of a semiconductor material, with two electrodes connected at either end, namely the drain and the source.