Recent content by anhnha

I am really looking for the answers to this question. Hope someone could make it clear.

Thank you! Could you explain about unrealistic phenomenon here? Why is there a charge accumulation? I don't see how is each side of equation 2.61 can be zero. For the right hand side part, the total current always flows from p to n and in the left hand side the total current always flows from p...

I simulated the oscillator. If Vdd is step voltage then the oscillator oscillates but if Vdd is constant then it doesn't oscillate. Could you explain why?

Hi, the resistances are same (not exactly because tolerance)

Thanks for the detailed answer. I have some problems understanding the oscillator. The first one relating to the boldfaced part above. I don't get what you meant here. Second problem is that how can the oscillation start up? Two transistors are exactly the same, so which one will be ON first...

Hi, I read that that circuit can be converted to LC tank circuit using negative resistance of these mos transistors. So I think they are equivalent.

So, could you explain why this cross coupled oscillator below oscillate? It is only connected with a DC voltage source.

Thanks a lot! I have one more question. Assume I have an ideal parallel LC and it is connected permanently with an ideal constant voltage source. Does the LC tank oscillate with a sinusoidal waveform? I am confused because it is connected with a constant voltage source?

I am wondering why LC tank only oscillates at resonant frequency not other frequencies? Is there a physics explanation for that?

Yes, I searched a lot but still feel confused. I am doing some integrals and really curious. That makes sense. Is there an direct explanation to this even philosophy?

A point has no dimension and a line, which has dimension, is made from points together. How does something without dimension create something with dimension? I can't really make any sense of it. Could you share your opinions?

Thank you, SteamKing and AlephZero. SteamKing: I didn't express it clearly. My question is why in circuit analysis using Laplace (for example, the analysis given in the link), the author didn't consider about the existence of Laplace Transform and Inverse Laplace Transform before applying to...

Sorry for the link. I don't know why it doesn't work when I click in that link directly. Could you go to the first result in Google below? https://www.google.com.vn/#q=http:%2F%2Fpeople.seas.harvard.edu%2F~jones%2Fes154%2Flectures%2Flecture_0%2FLaplace%2Flaplace.html Here is the pdf version...

Thank you. For example, in the RLC circuit from this page below, how could you know that Laplace transform and its inverse transform exist before using them? In that example, I see that the author used Laplace and inverse transforms without considering the conditions for these transforms to...

I usually see that Laplace transform is used a lot in circuit analysis. I am wondering why can we know for sure that the Laplace and its inverse transform always exists in these cases. Thank you.