semiconductor-electronics--materials-devices-and-simple-circuits Question 35
Question: Q. 14. (i) Why is zener diode fabricated by heavily doping both
(ii) Draw the circuit diagram of zener diode as a voltage regulator and briefly explain its working.
U] [Foreign 2014]
Show Answer
Solution:
Ans. (i) Due to the heavy doping, the depletion layer becomes very thin and electric field, across the junction, becomes very high even for a small reverse bias voltage. (ii) Circuit diagram
Any increase / decrease in the input voltage results in increase / decrease of the voltage drop across
[CBSE Marking Scheme 2014] 1
Commonly Made Error
- Many students able to defined the working of zener diode but couldn’t write the reason of heavily doping of
and sides of the junction.