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What is Zener diode and There Type?


What is zener diode?
A zener diode may be a special kind of device designed to control within the zener breakdown region. Zener diodes acts like traditional p-n junction diodes underneath forward biased condition. When forward biased voltage is applied to the zener diode it allows large amount of electric current and blocks only a small amount of electric current.
Zener diode is heavily doped than the traditional p-n junction diode. Hence, it has very thin depletion region. Therefore, zener diodes allow more electric current than the normal p-n junction diodes.
Zener diode allows electric current in forward direction like a normal diode but also allows electric current in the reverse direction if the applied reverse voltage is greater than the zener voltage. Zener diode is usually connected in reverse direction because it's specifically designed to figure in reverse direction.
Zener diode definition
A zener diode may be a p-n junction semiconductor device designed to control within the reverse breakdown region. The breakdown voltage of a zener diode is carefully set by controlling the doping level throughout manufacture.
The name zener diode was named after the American physicist Clarance Melvin Zener who discovered the zener effect. Zener diodes are the essential building blocks of electronic circuits. They are widely used in all kinds of electronic equipments. Zener diodes are in the main wont to shield electronic circuits from over voltage.
Zener diodes used?
Using Zener diodes as constant-voltage diodes
The Zener voltage across a diode remains constant over a wide range of Zener current. Because of this property, Zener diodes ar wide used as constant-voltage devices.
Using Zener diodes as voltage detection devices
A Zener diode permits Zener current, Iz, to flow when the voltage is above the specified Zener voltage. Thus, a Zener diode can be used for voltage detection by sensing Zener current with some other device.
Advantages of zener diode
Power dissipation capacity is very high
High accuracy
Small size
Low cost
Applications of zener diode
It is normally used as voltage reference
Zener diodes are utilized in voltage stabilizers or shunt regulators.
Zener diodes are used in switching operations
Zener diodes are utilized in clipping and clamping circuits.
Zener diodes are used in various protection circuits
Types of Diodes
The various types of diodes are as follows:
Zener diode
Avalanche diode
Photodiode
Light Emitting Diode
Laser diode
Tunnel diode
Schottky diode
Varactor diode
P-N junction diode

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