In breakdown region, a zener diode behaves as a |
|||
a) |
Constant current source |
b) |
Constant voltage source |
c) |
Constant resistance source |
d) |
Constant power source |
In breakdown region, a zener diode behaves as a |
|||
a) |
Constant current source |
b) |
Constant voltage source |
c) |
Constant resistance source |
d) |
Constant power source |
(b)
When the reverse voltage across a zener diode exceeds the breakdown voltage the current increases very sharply. In this region, the curve is almost vertical. It means voltage across zener diode is constant at
even though the current through it changes. Therefore, a zener diode behaves as a constant voltage source.