Recent content by varunag

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    Value of Voltage Reflection Coefficient

    thanks maverick, for the prompt reply. a few things i have understood after reading your post and then the book: 1. The VRC I've mentioned, is the "voltage reflection coefficient" of the load impedance Z_L. 2. The formula does depend on the choice of our z. And I was earlier making some mistake...
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    Value of Voltage Reflection Coefficient

    hi i was studying the "wave characteristics of transmission lines". while considering the lines with resistive termination, the term "voltage reflection coefficient(VRC)" came. With reference to the book, "Field and Wave Electromagnetics", by David K. Cheng, the following expression was...
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    Understanding Eigenfunctions and Eigenvalues in Quantum Mechanics

    In case you are not aware of eigenfunctions: http://mathworld.wolfram.com/Eigenvalue.html"
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    How Does Quantum Mechanics Describe Momentum in Three Dimensions?

    The result you have given is known, but I don't know how the result came. i.e. how do we write: \langle \vec{p}|\vec{r} \rangle = \langle p_x|x \rangle \langle p_y|y \rangle \langle p_z|z \rangle ?
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    How Does Quantum Mechanics Describe Momentum in Three Dimensions?

    In our Quantum mechanics course we were told that the wave function can be projected in the momentum space by taking the Fourier transform of the projection of the wave function in the coordinate space. This was shown in one-dimension as: \langle p|\psi \rangle = \int_{-\infty}^{\infty} \langle...
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    Role of Pre-Amplifier in Nuclear Electronic Systems

    @DaleSpam's reply does this imply that the pre-amplifier just acts as a buffer? Also, I was thinking of how would the role of a pre-amp change in case we need a current amplification, instead of voltage amplification?
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    Highlighting Text in Linux - Solutions & Tips

    how about if the pdf has symbols(those beautiful mathematics symbols)?
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    Highlighting Text in Linux - Solutions & Tips

    i just posted the question... and i found one answer myself :) there is a software 'Xournal', which can be used for annotating pdf. i just checked the highlighting feature, and it works fine. I'm using ubuntu, and installed xournal using the repositories. hope this information might...
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    Highlighting Text in Linux - Solutions & Tips

    hi, i am using linux these days. i am facing with a problem regarding highlighting text in any pdf. In windows, we can do this using Adobe Acrobat or Foxit Reader(there may be more softwares). But I couldn't find any software which could do this in linux. One of my friends suggested me that...
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    More than one gain crossover frequency

    Hi I was plotting the bode plot for \frac{1}{s^2 + 1} . I found the following bode plot, http://home.iitk.ac.in/~varunag/prob2q1-uncomp.jpg" Here we can see two gain crossover frequencies. Thus two phase margins. On googling, I found this paragraph in a book: Which of the phase margins...
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    Doubt about NMOS Transistor in Microcap: Varunag

    Well we know 4 terminal mosfets. And we usually short the body with the source. only this time we tried to give some voltage to the body, to check the theoretical relations we have. It seems the first order model used by "Microcap" software, is inadequate to deal with this, and we need to check...
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    Doubt about NMOS Transistor in Microcap: Varunag

    I found the problem with the design. When we give positive supply to the body, we are making the body-source junction reverse bias.(I have not mentioned in my query that source is grounded, but I suppose that could be expected by the way I had given the values) And on further increasing the...
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    Doubt about NMOS Transistor in Microcap: Varunag

    I was making a model of a NMOS transistor in Microcap. It was part of an assignment. I was supposed to make graph with changing value of V_{BS}. But after a certain value of V_{BS}, I got negative current. It came to my mind it is not possible. But, I couldn't think of a reason instantly, as to...
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    Significance of AVcc pin in ATMEGA 16

    oh okay. got it. so you mean, that we always need to power the AVcc. If we don't need to use the ADC feature then we can short AVcc and Vcc. But if we want to use ADC, then we can use a filter at AVcc. thanks deakie.
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    Significance of AVcc pin in ATMEGA 16

    well thanks. but there must be some reason for it. I hope someone might be knowing the reason for this. Or I'm asking a too trivial thing, and I shouldn't be bothering about it?
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