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Recent content by boozi

  1. B

    Active Filter Design

    Thanks again for all the patience you have when explaining me these things. I really appreciate it. If we decide to reduce the load (by increasing the load resistance) so that it's lower than the signal's impedance, won't it cause distortions to the output signal?
  2. B

    Active Filter Design

    Sorry about being so confused about this.... But when you say "when you reduce the load on the signal then it might increase, not decrease" doesn't it mean that reducing the value of the load resistance might increase the signal (thus, having a gain > 1)?
  3. B

    Active Filter Design

    Ok, so should I just increase the value of the load resistance in my original LC circuit in order to decrease the gain?
  4. B

    Active Filter Design

    Here's the smaller circuit. So that's what you meant by having a small resistance?
  5. B

    Active Filter Design

    My bad. I thought that I included it with my original circuit. I'll upload the schematic/simulation when I get back home!
  6. B

    Active Filter Design

    I just thought about it a little.... If the high Q makes the impedance higher, how come the gain is not higher than 1 in the "smaller" circuit I posted? The one with only one inductor, one capacitor, and one resistor.
  7. B

    Active Filter Design

    Ok, thanks anyways. I'll see what I can do about my issues.
  8. B

    Active Filter Design

    Ok, thanks for the clarification. When we actually built the PCB last semester, we tried it out, and in the end, the output signal was massively attenuated... Is there any chance you know how to add the noise factor in PSPice? I would like to try and simulate the design with the additional noise.
  9. B

    Active Filter Design

    Can you please elaborate more on that? What's exactly the reason for the gain?
  10. B

    Active Filter Design

    Sorry about that. Here are the schematic & simulation!
  11. B

    Active Filter Design

    So I've been looking at the design I created last semester, and one of the things we couldn't figure out was why there was a gain (about 8) in the LC filter.... Does anyone have any thoughts on that? The circuit contains only inductors, capacitors, and one resistor (to match the load).
  12. B

    Active Filter Design

    CRISespecialist -> Thanks for the tip. That's what I've been doing with my first design (the one I made a month ago), and it worked out ok, but I had to modify it again... Audioguru -> That's the problem. If I want to increase that resistor's value, I'll have to increase the other ones as...
  13. B

    Active Filter Design

    Will work on it later this week (got exams on Wed + Thurs). I'll get back to you with more updates! Audioguru -> That's one of the problems..... If I want that resistor's value to increase, I have to decrease the capacitors, but that causes the other resistors to increase by a huge factor :\
  14. B

    Active Filter Design

    So I've tried two circuits that were in the book you suggested (well, one is a "special" case of the other one). I calculated everything and here are the results. As you can see, all is well with the ideal op amp. I'm pretty sure I'm doing something wrong with the real op amp. Technically, the...
  15. B

    Active Filter Design

    We tried it on a spectrum analyzer, but "funny" stuff happened.... In the end, though, I changed a few components, and it somewhat worked... Not as well as we wanted, though. Btw, JimB -> Do you think that the THS4271 will work with the cascaded filter you suggested? Well, what I mean by that...
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