March 2006
Intermediate to advanced
960 pages
25h 28m
English
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7
Biasing
7.1 Introduction
Each of the two junctions of the BJT has a potential barrier across it that does not allow both type of charge carriers (holes or electrons) to cross the junction and hence, current does not flow through any of the junctions. This forces the BJT to be considered as an idle device and hence it does not act (work). In order to bring the BJT from idle to active state, appropriate external dc potential must be applied across both junctions to allow current carriers to cross the junctions.
The emitter serves as the supplier of current carriers (holes or electrons). The external dc voltage applied across Emitter-Base Junction (EBJ) must cancel the reverse bias (potential barrier) inherently present and must force the current ...
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