Name: Digital Electronics and Logic Gates
Uploaded: 2019-07-19
Duration: 10 min 7 s
Description: Did you know that all our computers use some transistors? These transistors, in turn, are based on logic gates. This video explains the logic gates in detail.

Question

What is zener diode? How is it used as a voltage regulator?

Accepted Answer

A Zener diode is a special-purpose diode that functions normally when forward biased but allows current to flow when reverse biased if the Zener voltage is exceeded. It maintains a constant reference voltage across its Zener voltage when it is exceeded. Zener diodes are frequently employed as a basic voltage regulator because of this property. It is used to produce a stabilised voltage output with low ripple under varying load current conditions.

There is a tiny leakage current when the Zener diode is given reverse bias feedback until it reaches the breakdown voltage or a constant voltage. It works in the breakdown region when reverse biased. The current begins to flow without interruption at this point, with no change in voltage. As a result, the constant voltage aids the Zener Diode's function as a voltage regulator.

What is zener diode? How is it used as a voltage regulator?

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