Recent content by jinyong

Any good online pdf files or websites with examples on how to draw bode plots?

Does anyone know where I can get a copy of pspice? I just want to try out the examples in the Sedra and Smith's "Microelectronic" textbook examples.

Why is there a VCE sat for BJTs? Where does it come from? Can someone explain physically?

Can someone please explain why ideal voltage/current sources are short circuit for voltage source and open circuit for open circuit in small signal analysis? Any mathematical proof to this?

What is the role of the oxide in MOSFETs?

Why is it that when there's transfer of charge onto the metal it always forms on as close to the surface as possible and in a thin sheet?

I am wondering why the law of mass action in semiconductors is this relation: n*p=ni^2. Any proof of this why is it not n*p=ni^3 or something...Also why doesn't dopants affect this relationship since doesn't dopants increase the overall number of carriers?

Q=CV for a capacitor. The Q is for the amount of charge on one plate right(for parallel capacitor case)? So is the total charge 2Q on the capacitor? Does it always have +Q on one plate and -Q on the other? Will it ever happen when it's +Q on one plate and not -Q on the other or vice...

Can someone please recommend a good intro physics book to study electromagnetics.

What you have said makes a lot of sense. However do you know why Va is the only parameter that appears to the "outside" world? Why doesn't the Phi(built-in) kind of cancel the Va since Phi is the drop across the deletion region under low injection conditions. Let me know what you think...

I believe it's the top band that's the conduction band and bottom band is valance band. I see. If Va is the voltage drop across the diode(like when you solve a circuit problem you assume 0.7V drop) then why do they define the Phi variable as the drop across the semiconductor? I think that's...

Thank you for replying and writing such a detailed explanation. I just have a couple of questions that I still don't get. I'm not sure what this means. The diagram indicates for the electrons to wander to the p side it's a higher potential. And for the holes to wander to the n side it's a...

Too see what I'm talking about refer to equation 4.2.1 of http://ece-www.colorado.edu/~bart/book/book/chapter4/ch4_2.htm Thanks.

Hmm my semiconductor book defines as Phi = Phi(built-in)-Va(voltage applied) And Va as the voltage applied. If it is the way u described shouldn't it be Phi=Va-Phi(built-in) and if Phi > 0 then it's forward biased? The book also defines when Va is about Phi(built-in) then it's considered high...

For a PN junction diode, the total potential across the semiconductor equals the built-in potential minus the applied voltage. Phi = Phi(built-in)-Va(voltage applied) My question is what happens when the Va exceeds the Phi(built-in)? Will the Phi = negative? But how come they always...