Recent content by kliker

thanks for your help guys, i took the exam today I was lucky to have solved exercises that he had uploaded on his page and i think i did well thank you again

thank you, I won't give up, even if I fail I will try my best this summer I would love to have a decent tutor, because my prof is not good at all

the physics I am doing now is called "Electronic Physics" it has to do with circuits, transistors, diodes etc

i can't understand it, our teacher is not good at all, he hasnt even solved a decent exercise the whole semester and whenever I go to his office to ask something, he's always like "be quick because I have work to do", I am studying Computer Science and I love it, but man, physics, it's so hard...

we have Eb - 0.7 = Ic1*Re we find Ic1 from Eb Vcc - Ic(Rc+Re) - Vce = 0 V1 - Ic(R1+Re) - Vce = 0 we find Vce from these two statements and Ic which I will have to add Ic1? and how can this help me solve the problem?

Vbe multiplier? Hm, I don't know, actually we ve never done something like that before I can't understand how it is possible to have current through transistor since Ib = 0 we know that Ic = beta*Ib so if Ib is 0 Ic should be 0 too, or no? let's just assume that there is no current going...

no they give no value for Vcc only for R1 and R2 in the circuit it wants actually only V0 if we assume that there is no current going through the transistor will V0 be just I(R1+R2)? i think I am wrong again the circuit is very confusing for me :(

in my book it says that when we are in cut off region, there won't be any current going through the transistor, because we can assume that it's open, like in an open circuit so the current will go from the two resistors only but I am not sure if i understood this 100%

but since it says that beta is too large, can't we assume that it is in cut off region? hence the current will be going only through the two resistors?

thanks a lot i think I understand now so we have something like this [PLAIN]http://img716.imageshack.us/img716/6910/pnp.jpg in our book they use the symbol in a different way but now i can understand that it is the same thing hence again the logic is the same I guess since we have b too...

Hi thanks for the answer but how can positive current go like this in pnp? Shouldnt it work like this in npn transistor? Also, I'm not sure what is reverse beta number, can you please explain it more? thanks a lot :)

I think that I found out the solution while I was taking a bath 5 minutes ago I thought that maybe the sign next to Vcc shows the current of electrons, which is correct in pnp transistor we know that b is too large but also we know that b = Ic/Ib so if b too large then Ib -> 0 hence we are...

[PLAIN]http://img256.imageshack.us/img256/2164/transistor.jpg i should find Re so that transistor works in saturation region also i should find Ib in saturation region Rc=2kΩ , R1=2kΩ , EB=5V, Vcc=10V, V1=3V, β=100 im really confused with R1 and V1 i don't know what is their function i...

[PLAIN]http://img685.imageshack.us/img685/2164/transistor.jpg having this transistor how can I find Vo? We know that βdc is too large and also R1 = 10KΩ and R2 = 30KΩ i just can't understand what to do, I mean it's pnp, so why does the current goe from top to bottom? shouldnt it go from...

you are right, thanks a lot :))