Figure 2 shows a more realistic BJT cross-section. Collector virtually surrounds entire emitter region. This makes it difficult for electrons injected into base to escape collection. Device is not symmetrical. Can emitter and collector be interchanged? Is this BJT a uni-directional device? Explain.

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Figure 2 shows a more realistic BJT cross-section.
Collector virtually surrounds entire emitter region. This makes it difficult for
electrons injected into base to escape collection. Device is not symmetrical.
Can emitter and collector be interchanged?
Is this BJT a uni-directional device?
Explain.

 

P
E
n
n
B
Fig. 2
Transcribed Image Text:P E n n B Fig. 2
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