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For transistor action, which of the following statements is correct?
A
Base, emitter and collector regions should have same size.
B
Both emitter junction as well as the collector junction are forward biased.
C
The base region must be very thin and lightly doped.
D
Base, emitter and collector regions should have same doping concentrations.
Detailed Solution
For a bipolar junction transistor: length profile is $L_C > L_E > L_B$, and doping profile is E > C > B.
For transistor action, the base region must be very thin and lightly doped, the emitter-base junction is forward biased and the collector-base junction is reverse biased.