Question

The temperature coefficient of a breakdown diode based on Avalanche breakdown is

• A. Positive
• B. Negative
• C. 0
• D. None of the above

Answer 1

The correct option is A Positive

In an avalanche breakdown, a bunch of electrons knock out other electrons to conduction band creating an 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.