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  • (a) Draw circuit diagram and explain the working of a zener diode as a dc voltage regulator with the help of its I-V characteristic. (b) What is the purpose of heavy doping of p- and n-sides of a zener diode ?   <div sty

(a) Draw circuit diagram and explain the working of a zener diode as a dc voltage regulator with the help of its I-V characteristic.

(b) What is the purpose of heavy doping of p- and n-sides of a zener diode ?

 

 

 

 
 
 
 
 

Answers (1)

a)

If the input voltage increases, the current through Rsand Zener diode also increases. This increases the voltage drop across Rs without a change in the voltage across the Zener diode. This is because, in the breakdown region, Zener voltage remains constant
even though the current through that Zener diode varies. 

I-V chara of zenerdiode

(b) Heavy doping of p and n side of a zener is done to decrease the width of the depletion region which increases
the electric field at the junction.

Posted by

Safeer PP

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