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[SOLVED] What logic gate is this?

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TotalNoob

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I have found sketch of something like this in my notebook. It says only XOR. My question is if this is any valid logic gate? And can you explain me this emitter connected to base thing?
 

It looks to me like it's a weird inverter. But it also looks like a circuit designed to destroy a transistor, because 5V reverse bias B-E is not good idea.

Why don't you try writing a truth table?

e.g.

Base=0, Emitter=0, OUT=1
Base=1, Emitter=0, OUT=0
.
.
.
Try it, it's fun!!
 

I have no idea how the current flows in this so Im unable to do that. Otherwise i would not ask
 

TotalNoob said:
I have no idea how the current flows in this so Im unable to do that. Otherwise i would not ask
Click to expand...

Well, what DO you know? Do you know how a transistor works? If not, perhaps you should learn about that first.
 

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