Diode: How it works and Its Practical Applications

The diode is an electrical component which is widely used in power supplies. In this post, you’ll learn the working of the diode and its practical applications.

What is Diode and what is diode biasing

A diode has two-terminal device namely the anode (+ve) and the cathode (-ve). The application of dc power supply to the diode is known as bias. There are two modes of diode operation. The forward bias during which same terminals of diode and battery are connected to each other, and the reverse bias during which the opposite terminals are connected.
  1. During forward bias, a diode conducts the current.
  2. During reverse bias, a diode stops the current.
Let’s  understand the behavior of diode in this diagram:
Where in above circuit:
Let’s watch this video for completely understanding the working of PN junction:

Practical applications

Practically a diode is used in the rectifier circuits. Such circuits are responsible for converting ac to dc. We can find a diode in our dc power supplies such as mobile phone chargers, laptop chargers and in many electronic applications. Along with basic diode, there are special purpose diodes such as a Light emitting diode, Zener diode, Tunnel diode, Schottky diode which are widely employed in different applications.

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