Question

15. Why is the emitter, the base and the
collector of a BJT doped differently?​

Answer 1

Answer:

To improve the emitter efficiency and the common-base current gain (a), it can be shown that the emitter should be much heavily doped than the base. ... A low doping level of the collector increases the size of the depletion region. This increases the maximum collector-base voltage and reduces the base width.

Explanation: