Electronics Engineering Basic Concept

Semiconductors:

• Materials that grant flow of electrons are called conductors (e.g., gold, silver, copper, and so on.). 
• Materials that block flow of electrons are called insulators (e.g., elastic, glass, Teflon, mica, and so on.). 
• Materials whose conductivity falls between those of conductors and insulators are called semiconductors. 
• Semiconductors are "part-time" conductors whose conductivity can be controlled.

Semiconductors

Semiconductors Use:

Semiconductors are used as a part of numerous electrical circuits since we can control the flow of electrons in this material, for instance, with a controlling current. Semiconductors are also utilized for other unique properties.

How Semiconductor Works:

To see how semiconductors work, you should first comprehend somewhat about how electrons are sorted out in a molecule. The electrons in an atom are organized in layers. These layers are called shells. The peripheral shell is known as the valence shell.

Diodes:

• A Diode is the least complex two-terminal one-sided semiconductor device. It permits current to flow just in one direction and obstructs the current that flows the other way. The two terminals of the diode are called as anode and cathode.
• A Diode is an electronic device that permits current to flow in one direction only.
• Most diodes are made with semiconductor materials, for example, silicon, germanium, or selenium. 
• A few diodes are comprised of metal electrodes in a chamber emptied or loaded with a pure elemental gas at low pressure.

Diode

Characteristics of a Diode:

A perfect switch when open does not lead current in either directions and in closed state conducts       in both directions. 

The diodes is designed to meet these features hypothetically however are not accomplished for all       intents and purposes. So the practical diode qualities are just near that of the desired.

Diodes Uses:

Semiconductor diodes can be utilized for many applications. The fundamental application is clearly to correct waveforms. This can be utilized inside power supplies or inside radio detectors. Signal diodes can likewise be utilized for some different functions inside circuits where the "one way" impact of a diode might be required.

Types of Diodes:

An overview of the different types of diode that are available:

1. Backward Diode
2. Laser Diode
3. Light Emitting Diodes
4. PIN Diode
5. Stop recovery Diode
6. Tunnel Diode
7. Zener Diode
8. Photo Diodes