Question

For transistor action, which of the following statements is correct ?

• A. Base, emitter and collector regions should have same doping concentrations.
• B. Base, emitter and collector regions should have same size.
• C. Both emitter junction as well as the collector junction are forward biased.
• D. The base region must be very thin and lightly doped.

Answer 1

Answer: (D)

The base region must be very thin and lightly doped.

Answer 2

For Bi-polar junction transistor,
Length profile is $L_{C}>\,L_{E}>\,L_{B}$
and doping profile is $E>\,C>\,B$