What is a Zener diode? How is it symbolically represented?
kói. thanks. dedo
Answers
Answer:
A Zener diode not only allows current to flow from anode to cathode but also, in the reverse direction on reaching the Zener voltage. Due to this functionality, Zener diodes are the most commonly used semiconductor diodes. In this article, let us learn the function of Zener diodes along with its construction, operation and more.
Zener Diode Explanation
A Zener Diode, also known as a breakdown diode, is a heavily doped semiconductor device that is designed to operate in the reverse direction. When the voltage across the terminals of a Zener diode is reversed and the potential reaches the Zener Voltage (knee voltage), the junction breaks down and the current flows in the reverse direction. This effect is known as the Zener Effect.
Zener Diode Definition
A Zener diode is a heavily doped semiconductor device that is designed to operate in the reverse direction.
Zener diodes are manufactured with a great variety of Zener voltages (Vz) and some are even made variable.
How does a Zener Diode work in reverse bias?
A Zener diode operates just like a normal diode when it is forward-biased. However, when connected in reverse biased mode, a small leakage current flows through the diode. As the reverse voltage increases to the predetermined breakdown voltage (Vz), current starts flowing through the diode. The current increases to a maximum, which is determined by the series resistor, after which it stabilizes and remains constant over a wide range of applied voltage.
There are two types of breakdowns for a Zener Diode:
Avalanche Breakdown
Zener Breakdown
Answer:
Explanation:
A zener diode is a specially designed junction diode which can operate continuously, without being damaged in the region of reverse breakdown voltage. Symbolically, it is represented as follows. ... Hence the voltage drop across the Zener diode and across the load resistance RL falls is normal value