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| + | Diodes are two terminal electric components with infinite conductivity in one direction and infinite resistance in other direction .is a type of electrical breakdown in a reverse biased p-n diode in which the electric field enables tunneling of electrons from the valence to the conduction band of a semiconductor . | ||
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| − | + | Zener Breakdown | Avalanche Breakdown | |
| − | + | In the Zener effect or Zener breakdown , the electric field enables tunneling of electrons from the valence to the conduction band of a semiconductor in a reverse biased p-n diode . Both sides of PN junction are heavily doped in zener breakdown |The avalanche breakdown occurs when carriers in the transition region are accelerated by the electric field to energies sufficient to create mobile or free electron-hole pairs via collisions with bound electrons. Both sides of PN junction are lightly doped in avalanche breakdown . | |
| − | + | Zener current is independent of applied voltage . |Charge carriers acquire energy from the applied potential . | |
| − | + | A strong electric field is produced . |Electric field produced is weak in nature . | |
| − | + | Large number of holes and electrons are produced . | Electron hole pairs are generated . | |
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Latest revision as of 17:04, 18 March 2016
Diodes are two terminal electric components with infinite conductivity in one direction and infinite resistance in other direction .is a type of electrical breakdown in a reverse biased p-n diode in which the electric field enables tunneling of electrons from the valence to the conduction band of a semiconductor .
| Zener Breakdown | Avalanche Breakdown |
|---|---|
| In the Zener effect or Zener breakdown , the electric field enables tunneling of electrons from the valence to the conduction band of a semiconductor in a reverse biased p-n diode . Both sides of PN junction are heavily doped in zener breakdown | The avalanche breakdown occurs when carriers in the transition region are accelerated by the electric field to energies sufficient to create mobile or free electron-hole pairs via collisions with bound electrons. Both sides of PN junction are lightly doped in avalanche breakdown . |
| Zener current is independent of applied voltage . | Charge carriers acquire energy from the applied potential . |
| A strong electric field is produced . | Electric field produced is weak in nature . |
| Large number of holes and electrons are produced . | Electron hole pairs are generated . |