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Why B>E / E>B?

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audioguru

Well-Known Member
Most Helpful Member
Why is the current in transistor represented as:
B>E in NPN
E>B in PNP
No.
The base current is less than the emitter current.
The base voltage is more positive than the emitter voltage for a turned on NPN transistor.
The emitter voltage is more positive than the base voltage for a turned on PNP transistor.

Why C>E; C>B or something else?
No.
The collector voltage is less than the base voltage for a saturated transistor.
 

hkBattousai

Member
Why is the current in transistor represented as:
B>E in NPN
E>B in PNP

Why C>E; C>B or something else?

B- Base
C-Collector
E- Emitter

This is a very fundamental question which is related to solid state electronics. There is a lot of physical event occurring inside transistor, like Hall Effect, Avalanche Effect, hole-electron displacements, hole-electron diffusion, etc...
I suggest you read a Wikipedia article about this to start with.
 
Sorry Everybody....it was my vague way of expressing my question

I just want to know why in the Diagrammatic Representation of Transistor,
the current directions are denoted by an arrow >
i,e,. Base to Emitter in Npn Transistor
Emitter to Base in Pnp Transistor?

my question is is why not current direction is denoted as Collector to emitter?(because even that would mean the same)
:)
 

hkBattousai

Member
Because the current flows in the arrow direction. Doesn't that make any sense? Is there any better notation that you can suggest?
 
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