This question is somewhat relating to electronics but I think it fits better with physics.
The leccture here (slide 13) shows that the gate to body capacitance (Cgb) in linear region is 0. However, there is no explanation at all.
I tried to find the explanation from the reference book and got...
I am having a hard time understanding flat band voltage in MOS capacitor.
Please see the picture below about MOS capacitor.
Q0 is a fixed effective charge at the surface between oxide and semiconductor and it is positive here.
The voltage across the oxide caused by the fixed charge ψox =...
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?
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...
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?
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.
iB1: holes in Base move from Base to Emitter
This is same as electrons from emitter, recombining with holes in Base to become valance electrons and they continue move to B.
iB2: electrons from emitters recombining with holes in Base and continue move to B
I don't see any difference. Please help.
I would like to ask some more questions.
In pure semiconductor, thermal energy will create electron-hole pairs all the time. If there is not recombination ( I mean electrons go from conduction band to valance band) then the current will continue forever and the pure semiconductor will become a...
I am reading about Boost-Flyback converter and this is a bit confusing.
Could you explain the role of D1 and C1 here?
The lecture says that "D1 and C1deliver to the output the energy stored in the transformer leakage inductance Ld." I can't understand what is meant here.
And could you explain...
I am confused about shared contacted diffusion in CMOS layout.
Is it possible to use shared contacted diffusion for two nMOS transistors with different widths?
BTW, two nMOS and pMOS transistors are never shared contacted diffusion, right?
Thanks. I see no difference in functioning between my solution and the key in the book.
I also can derive the circuit given in the solution.
However, I can't figure out why the author used the key solution not the one I get above.