What is the difference in mechanisms in which IB1 and IB2 are formed?


by anhnha
Tags: difference, formed, mechanisms
anhnha
anhnha is offline
#1
Sep12-13, 02:20 AM
P: 149
Hi,
Can anyone help me? What is the difference in mechanisms in which IB1 and IB2 are formed in the picture below?

http://en.wikipedia.org/wiki/File:NP...n_(Active).svg
Thanks.
Attached Thumbnails
base current.JPG  
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anhnha
anhnha is offline
#2
Sep12-13, 11:24 AM
P: 149
Hi,
I am a bit confused about base current in BJT transistor. Please help.
Here is a picture from a lecture.

I want to ask about iB1 (hole injection from B to E).
Holes in base are injected into emitter and then they recombined with electrons in emitter.
Are electrons in emitter that recombine with holes from base valence electrons?
If, for example, all electrons in emitter that recombine with holes from base are free electrons then
hole injected from B to E iEp will not exist, right?
Attached Thumbnails
base current 1.JPG  
anhnha
anhnha is offline
#3
Sep21-13, 10:58 AM
P: 149
Hi, can anyone help?


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