Question

As the voltage on the drain is increased, a value is reached at which the pn junction between the drain region and substrate suffers avalanche breakdown known as

(a) Weak avalanche

(b) Strong avalanche

(c) Weak storm

(d) Punch-through

I have been asked this question in unit test.

This interesting question is from The Body Effect topic in chapter MOS Field Effect Transistors (MOSFETs) of Electronic Devices & Circuits

Answer 1

Correct choice is (a) Weak avalanche

The explanation: As the voltage on the drain is increased, a value is reached at which the pn junction between the drain region and substrate suffers avalanche breakdown. This breakdown usually occurs at voltages of 20 V to 150 V and results in a somewhat rapid increase in current (known as a weak avalanche).