The base of a transistor is lightly doped. Explain why?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

In a transistor, the majority carries form emitter region moves towards the collector region through base. If base is made thick and highly doped, majority carriers will combine with the other carriers within the base and only few is collected by the collector which leads to small output collector current. Thus in order to have large output collector current, base is made thin and lightly doped.

Answered by  | 4th Jun, 2014, 03:23: PM