Help me with my electronics homework...

[eldorado99]

I know it has something to do with a different polarity on the emitter and collector but I cannot for the life of me remember what it is. (This is electronics 12)

 

[Jassi]

electronics 12?

high-school or college?

 

[BEL6772]

Initials say it all. Those are both BJTs. One is made with n-type collector and emitter with a p-type base, the other has p-type collector and emitter with an n-type base.

 

[TuxDave]

BJT = Collector - Base - Emitter

CBE
pnp
npn

One has the C&E doped w/ a group V element and the other with a group III

 

[eldorado99]

Originally posted by: Jassi
electronics 12?

high-school or college?

High school.

 

[MetalMat]

I think PNP transistors physically take up more space.

 

[dowxp]

iirc,

with the pnp, the b-e junction is forward biased and is reversed biased in the npn.

basically in a pnp you have current going from the e to the c and in a npn from c to e;


i think >_> ; c - collection; b - base; e - emitter

 

[TuxDave]

Originally posted by: dowxp
iirc,

with the pnp, the b-e junction is forward biased and is reversed biased in the npn.

basically in a pnp you have current going from the e to the c and in a npn from c to e;


i think >_> ; c - collection; b - base; e - emitter

Now are we talking about 'real' current or the bastardized current that all EE's gotta follow.

 

[dowxp]

bastardized. of course; talking about ideal models >_>

 

[91TTZ]

NPN transistors have 2 n's and one p, while pnp transistors have 2 p's and one n. NPN's also taste better.

 

[eldorado99]

Ok, thanks guys, got me out of a jam there 🙂.