As a student of physics, you will learn about diodes. To begin with, it is important to understand that there are several different types of diodes that are available. They are used to enable diverse types of applications to be met. The diodes for high voltage and current, for the small signal applications, light detection and emission, and also for providing the variable capacitance are available today. Furthermore, there are various kinds of diodes which are also used in the microwave application.
Before going ahead, it is important to understand what a diode actually is. It is a two-terminal device, which has two active electrodes, and between which the device permits the flow of current in just one direction. These diodes are known for their unidirectional existing property, whereas the electric current is permitted to transfer in just one direction. These devices are actually used for the idea of rectifying the waveforms. They can be used within the 2cl2FL or the radio detectors.
These devices are also used in the circuits where the one-way effect of diode is most needed. Most of the diodes are made using the semi-conductor materials such as silicon and germanium. The diodes are known to send out the electric currents in just one direction. However, the method can vary a lot. There are different kinds of diodes that can be used in the electronics design. Some of them are mentioned below:
Light Emitting Diode (LED): This is the most popular type that allows the flow of electric current between the electrodes; and light is produced. In most of the cases, the infrared light is not visible because of its frequencies which do not permit visibility. At the time when the diodes are switched on or forward-biased, electrons re-combine with the holes and transmit energy in the form of light. Furthermore, the color of the light is dependent on the semi-conductor’s energy-gap.
Avalanche Diode: The device operates in the reverse-bias, and utilized the avalanche outcome for its operation. This breakdown usually occurs across the whole PN junction, when the voltage remains constant and independent of the electric current.
Laser Diode: This is quite different from the LED type, as it is known to produce coherent light. The devices also find their application in the laser pointers, DVD and CD drives, etc. They are more expensive than LEDs but cheaper than other types of laser generators.
If you wish to learn about the different other types of diodes and their uses then consider hiring a private home tutor who can explain them to you with illustrations.