Read about electrical engineer | 23 Discussions | Page 1

  1. Boltzman Oscillation

    Where is the demodulator in this AM receiver?

    I am trying my hands on building receivers and transmitters. For now I would like to build this receiver here: now I see that the 500pH inductor in parallel witht he 200uH capacitor are in charge of filtering the unwanted frequencies. The top-left NPN is in my guess an emitter follower to...
  2. Boltzman Oscillation

    What approach should be used when solving a circuit?

    I am close to graduating as an EE major but I have never been able to organize a step by step method on analyzing a circuit. It seems to me that every time I am trying to analize a circuit I end up with a bunch of equations and nothing more. I know that I should: 1. Know what im solving for...
  3. putrinh

    How to solve this to calculate the input impedance?

    How did you find PF?: Google search I got a problem, how to calculate this formula from euler to imajiner? or how calculate this case?
  4. I

    Insulator spacing strength

    Well, I have one nice problem. I have 30x10mm busbar, and Isc=30kA. I must place this busbars in electrical panel, but I have a problem with insulators. Can I use a red insolators as it's showed on picture, or I should use special holders for busbar system. Another problem is: When I use such...
  5. Boltzman Oscillation

    Engineering How can I find the open loop voltage gain of this opamp?

    The open loop voltage gain is given as : $$ u(s) = \frac{u_o}{1+\frac{s}{w_o}} = \frac{100}{1 + \frac{s}{40}}$$ Where u_o is the d.c. voltage gain and w_o is the pole. The op amp that is given is: And I am told to use the non ideal op amp model as follows: Well my guess is that I can...
  6. W

    How to find the current and voltage in a circuit with current sources?

    Summary: Facing a circuit with 2 parallel resistors and 2 current sources (1 dependent, 1 independent). Trying to find the current, voltage, power delivered by the independent current source and power delivered by the dependent current source. I'm trying to start by finding the current i0 but...
  7. Boltzman Oscillation

    Engineering What is the best EE route for someone living in North Texas (DFW)?

    Good afternoon, I will be graduating with an EE bachelors in a year. To keep this brief, next semester I will be taking courses that branch off from general Electrical Engineering. I have the options of Telecom, Electronics, Control Systems, or Power Systems. Living in the DFW area, what would...
  8. M

    Two Different Designs of DC Motors

    Hello, I have two designs of DC motors. Which one is more efficient? I believe what is in question is the location of the communicator. Whether it should be closer to the out piece of the shaft turning the gears? Or should it be further away towards the end? Does this make a difference...
  9. Jayalk97

    Problems designing an FIR band pass filter on MATLAB?

    Homework Statement So I've been tasked with designing and band pass filter for my signals class. We're given the specifications that it needs to go from 200-5000Hz, and we need to use a kaiser window as the window function. Homework Equations There are 2 parameters, beta and N, given by these...
  10. D

    Engineering Electrical Engineer Seeking Career Advice

    I’m hoping that I can find some career advice that can shine some light on my situation… I served in the Navy where my primary duty was working with the ships radar and communication systems as well as providing support with other electronic warfare systems. When I discharged from the Navy I...
  11. mkematt96

    Solve Using Method of Node Voltages

    Homework Statement [/B] Homework Equations This problem was from a practice exam. I know what V1 and V2 should be but can't get my answer to match. V1 should be -3.214 V and V2 should be -12.214 V The Attempt at a Solution See attached picture for my work. [/B]
  12. O

    Derive The Transfer Function from First Principles

    All, I need help deriving the Transfer Function of this circuit from first principles. http://i66.tinypic.com/24v3z9s.jpg
  13. T

    Engineering Jobs combining programming with hardware?

    Hi, I'm a high school student in a STEM program, and as of now my primary interests have been in Computer Science, Math, and Robotics. Currently, as I research colleges, my intent is to double major in either Math and Computer Science, or in Computer Science and Electrical Engineering. However...
  14. TBert

    Job opportunities for CE and EE

    I am looking to major in Computer Engineering or Electrical Engineering and wanted to learn more about the majors. What I am most interested in is what job opportunities are available after college for each of the majors. From the research I have done it seems like EE (in Ohio) mostly do control...
  15. N

    How to compute the location of the antenna when I rotate it?

    Hi group, I have a question regarding to detect the location of the antenna. I read this link: https://en.wikipedia.org/wiki/Plane_wave In the "Complex exponential form" part, the equation: U(r,t) = U0 * exp(j*(k.r - w*t) as the function of location and time U0 = A0 * exp(j*phi) : A0 and...
  16. N

    How to calculate the time delay based on a function of antenna angle?

    Hi everyone, I am a new student who is studying on collecting data from TV signal. I hope everyone can help me for ideas. I am having spectrum analyzer which can define a TV station around me, so I chose 4 stations WHUT-TV [584MHz 590MHz], WPXN-TV [590MHz 596MHz], WTTG [60 MHz 608MHz], and WNVC...
  17. PhanicKnight

    [College Physics] Electric field and point charge

    Homework Statement Around a point charge there are three points: A, B and C. Determine the electric field vector for those points. Also, determine the force vector for q0 if it was in point B. Q = 10 µC, a = 1 m, b = sqrt(3) m, q0 = 10 pC 2. The attempt at a solution Here is the attempt at a...
  18. S

    Engineering Physicist, Electrical Engineer, or physician

    Hi, I am a rising junior in high school. I have always wanted to be an engineer. I eventually found out that I loved electrical engineering, ever since then my career path was focused on engineering. I discovered that I love physics as well. Every time I learn about a new physics topic I get...
  19. 7see

    Why we used capacitor in the fan ?

    One of my classmate asked me a question that Why we used capacitor in the fan ? I gave her the answer but she said the answer in not fully appropriate ! Any one give me proper explanation of this question ?
  20. Mahmoud Hamsho

    BS or MS in EE after physics BS?

    Hey, I will be graduating soon with a BS in Physics but have recently developed a interest to pursue a career in the EE field. I was planning to just head to a Masters program in EE, but the more I read up I am realizing that there is a difference in having a BS in EE and MS in EE. Im reading...
  21. J

    Engineering Square of resistors within a circuit. What is the equivalent

    Homework Statement Homework Equations -We can re-arrange circuit components into simpler orientations as long as the components' connections to previous nodes are maintained. The Attempt at a Solution -I attempted to re-arrange the loop of three resistors at the upper left region to no...
  22. N

    Schools Physics vs. Electrical Engineering in college

    So I'm a freshman in college right now and I am a physics major. The class I am also having most trouble with is.......physics. I am doing great in math but physics is tougher for me. I was thinking that maybe physics isn't for me, as also looking around I realized just how theory-based...
  23. pioneerboy

    Profession of Dr. Emmett "Doc" Brown

    Hi there, If you look through the trilogy of "Back to the Future" you come across many devices of Doc Brown. He's officially a physicist with theoretical knowledge, he's always claiming to conducting experiments, and he's great in building things...obviously. First question: what branch of...
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