Question
Tue February 14, 2012 By: Sagar

Why is the COLLECTOR -MODERATELY DOPED?

Expert Reply
Tue February 14, 2012
The Emitter is highly doped because all the free charges (  conduction electrons in Ntype and holes in P type) starts from Emitter. Base is lightly doped because we want that the base current should be small.Now the collector is moderately doped may be because we dont want  a crowd of electrons in the collector otherwise the electrons coming from the Emitter-Base path may repelled and collector current may decrease. 
Related Questions
Tue February 07, 2017

Please solve:  

Ask the Expert