How does zener diode maintains constant voltage ?

[munna007]

hello friends ,
In zener diode due to high doping ,electric field is very intense .So this electric fields knocks electrons from atoms and reverse current starts flowing during reverse biasing.

its said that at the same time it maintains constant voltage . Of which voltage we are talking about ?
is this is the voltage around junction due to reverse bias ?

 

[berkeman]

hello friends ,
In zener diode due to high doping ,electric field is very intense .So this electric fields knocks electrons from atoms and reverse current starts flowing during reverse biasing.

its said that at the same time it maintains constant voltage . Of which voltage we are talking about ?
is this is the voltage around junction due to reverse bias ?

Yes, it is the reverse bias voltage. Look up "avalanche breakdow", and tell us what it has to do with the reverse breakdown voltage of a zener diode...

 

[CWatters]

Basically the resistance changes from high to low above a certain voltage. Remember that ideal voltage sources have low internal resistance.