Question

Temperature coefficient of Avalanche breakdown diodes is

• A. positive.
• B. negative.
• C. both
• D. depends

Answer 1

The correct option is A positive.

In avalanche breakdown , a bunch of electrons knocks out other electron to conduction band creating electron hole pair. Due to increase in temperature ,vibrations of atoms increases and thus reduces the mean free path for electrons. Hence in avalanche breakdown, breakdown voltage increases with increase in temperature. Thus avalanche breakdown is positive temperature coefficient.