We know diodes as a device with two active electrodes and two terminals capable of passing current in one direction only. One of the main properties of a diode is to block current in one direction and allow current to flow in the other direction.
What are Diodes?
If the diode is in forward bias, the P-type terminal is connected to the positive terminal of the voltage source and the N-type terminal is connected to the negative terminal. The electron will be attracted for this purpose and will form a covalent bond with the P-type material.
When the diode is in reverse bias, the P-type terminal is connected to the negative terminal and the N-type terminal is connected to the positive end of the source.
Applications and Uses of Diodes
- The most important task would be to turn off some signal and convert the AC current to DC current. This efficiency would make them reformers.
- They are used in electrical switches and used in surge protectors because they can block voltage spikes.
- Diodes help in the processing of digital logic. Millions of diodes are used as logic gates and are used in modern processors.
- They are used to separate the signals from the receiver. For example, one important use of diodes is to remove negative signals from AC current. This is known as signal demodulation.
- This function is mainly used in radio as a filtering technique to extract radio signals from carrier waves.
- They are also used in power generation and voltage doublers. Using a full wave rectifier will help provide a more stable voltage.
- Connecting a diode to a capacitor will help multiply the low AC voltage to create a much higher voltage.
- Light-emitting diodes or LEDs are used in sensors as well as lasers and many other optical devices.
- Zener diodes are used as voltage regulators and varactors are used in electronic tuning and varistors are used to compress AC lines.