Describe avalanche and zener breakdown of PN junction with neat graph.

Describe avalanche and zener breakdown of PN junction with neat graph.
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1 Answer

Answer :

Avalanche Breakdown

It is observed in diodes having Vz> 8V. is called Avalanche Breakdown

It occurs due to accelerating minority carriers.

It shows gradual change.

Breakdown voltage increases with increase in temperature. 

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Zener Breakdown

It is observed in diodes having Vz = 5 – 8V. is called Zener Breakdown.

It occurs due to increased electric field.

Breakdown is very sharp.

Breakdown voltage decreases with increase in temperature 

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