Recent content by Peter Alexander

  1. Peter Alexander

    Probability from the tolerance of a capacitor (Gaussian distribution)

    By dividing the interval 30 - 39.6 from 26.4 - 39.6.
  2. Peter Alexander

    Probability from the tolerance of a capacitor (Gaussian distribution)

    Given the upper data, if the nominal value for capacitance is 33nF and tolerance of 20%, then values can range between 26.4nF and 39.6nF. With the bottom margin being set at 30nF, this means that the interval takes approximately 72% of all values. Is this the correct procedure to solve this...
  3. Peter Alexander

    Engineering Compute the voltage gain of this bipolar junction transistor circuit

    This is the given schematic. The result should be $$A_u = \frac{R_b g_{21}}{1 + R_b g_{22}} = -50$$ and the way I wanted to tackle this problem is by stating $$A_u = \frac{-R_b i_2}{u_1} = \frac{-R_b (g_{21} u_1 + g_{22} u_2)}{u_1} = \frac{-R_b (g_{21} u_1 + g_{22} u_2)}{g_{11} u_1 + g_{12} u_2}...
  4. Peter Alexander

    Differential Nonlinearity: What happens when DNL = -1LSB

    Homework Statement Question is simple: what happens when ##DNL = -1 LSB## where DNL signifies differential nonlinearity and LSB stands for Least Significant Bit. It is also required to try and sketch such condition. Homework Equations Equation for differential nonlinearity: $$DNL(i) =...
  5. Peter Alexander

    Engineering Computing resistance in given circuit with BJT

    Well, that's embarrassing, I should have read a bit more theory on BJTs. Obviously that was my flaw here. Thank you so much for helping me out and pointing me in the right direction. Solved!
  6. Peter Alexander

    Engineering Computing resistance in given circuit with BJT

    Hi, before you proceed with reading this question, I would like you to know what I do not expect anyone to solve this task for me. I have a problem with a single step in the solution and I'm only asking you to help me with this one step. 1. Homework Statement Compute ##R_B## so that Q-point of...
  7. Peter Alexander

    Uniform convergence of a parameter-dependent integral

    That helped a lot, thank you for your time and patience!
  8. Peter Alexander

    Uniform convergence of a parameter-dependent integral

    Yeah, I was wondering why this question would even exist or how does it pertain to the parameter-dependent integrals. I was contemplating this task for awhile and I don't think I'm even going in the right direction. I'm sorry for posting nonsense, but this is the line of reasoning I took trying...
  9. Peter Alexander

    Uniform convergence of a parameter-dependent integral

    Hello everyone! I'm a student of electrical engineering, preparing for the theoretical exam in math which will cover stuff like differential geometry, multiple integrals, vector analysis, complex analysis and so on. So the other day I was browsing through the required knowledge sheet our...
  10. Peter Alexander

    Solving Second Order Partial Derivative By Changing Variable

    I apologize for the late response, did read through the post and managed to finally solve the task. I would like to thank everyone here for helping me out on that one, I appreciate your time and effort! Really helped me a lot! Hope you're all having a fantastic Friday ;)
  11. Peter Alexander

    Solving Second Order Partial Derivative By Changing Variable

    1. The problem statement, all variables, and given/known data Given is a second order partial differential equation $$u_{xx} + 2u_{xy} + u_{yy}=0$$ which should be solved with change of variables, namely ##t = x## and ##z = x-y##. Homework Equations Chain rule $$\frac{dz}{dx} = \frac{dz}{dy}...
  12. Peter Alexander

    Solving Partial Differential Equation

    Thank you so much! I actually managed to find a solution this way, thanks!
  13. Peter Alexander

    Solving Partial Differential Equation

    1. The problem statement, all variables, and given/known data Task requires you to solve a partial differential equation $$u_{xy}=2yu_x$$ for ##u(x,y)##. A hint is given that a partial differential equation can be solved in terms of ordinary differential equations. According to the solution...
  14. Peter Alexander

    Understanding Transformer Phasor Diagrams

    This was actually incredibly helpful! Thank you for your time and patience! I finally understand how it works, thank you!
  15. Peter Alexander

    Java Android Studio: Accessing SQLite Data In RecyclerView

    Hello everyone! I'm working on a simple app for a project at the university and I'm having problems accessing the SQLite data in RecyclerView. I suspect that the problem lays in a connection with an activity that includes the RecyclerView and the RecyclerView adapter itself. My project, in the...
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