The output section of a common emitter transistor is supposed to be connected in reverse bias.Since both semiconductors(collector and emitter)are the same(either n or p),how is it possible to connect them in reverse bias?

Asked by Dhruva | 23rd Feb, 2012, 07:40: PM

Expert Answer:

Here collector and emitter are different and we make only emitter common not collector. Here to make base -collector junction reverse baised( say in npn transistor), we have to keep collector(n) at higher potential and base(p) at lower potential, In this case one may notice that both base and collector are at positive potential (for npn common emitter)
 
so what to do here? We will keep base at lower positive potential and collector at higher positive potential.

Answered by  | 24th Feb, 2012, 07:50: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.