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  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok no its not making sense to me. My initial thought was to put the capacitors over the power supply but there is only 5 circuits connected together and there are 6 capacitors to add to the circuit. do you mind "drawing them in for me?"
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I think that I pretty much have it sussed now, just need the last "Yes, that would work!" for my confidence
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    and where do the bypass filters go
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Would this work?!? with all the op-amp TL074CN
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    how many max?
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Why are the stages (A,B,C,D) not in order? all the stages stay the same!
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I noticed that when the filters have a reference voltage the last two filters out of the four swap around the values of the resistors and capacitors (in filterwizard). Because they are the same but not neccessarly the same order, is it that its the same outcome? do I just connect the grounds to...
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    can you help with post #254 please? cheers
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Cool, that is good!
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I want to modify the envelope detector circuit to run on virtual ground. I might need to swap out resistors and capacitors. For this precision full wave peak detector, I need to alter the resistors and capacitors for +VS 12Volt -VS 0Volt, for reference ground and I'll be using a TL074CN for the...
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    from post #243
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    how do I change the circuit to accomodate for the input bias current these types of questions, I can't just search for on a search engine!
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so alore Type: TL074CN: Quad JFET-input operational amplifier. LF353: Dual JFET-input operational amplifier. Pin Configuration: TL074CN: 14-pin DIP (Dual In-line Package). LF353: 8-pin DIP. Power Supply Voltage: TL074CN: Typically operates from ±4V to ±18V. LF353: Typically operates from...
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I can use the TL074CN for the pre-amp, I can the TL074CN the for filters, I can use the TL074CN for buffer circuit with the reference stage and that, I want to know if i can use the TL074CN in the - precision full-wave detector yay or nay? I also want to edit the circuit for it to run off the...
  15. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    is the order of the block diagram in post #243 correct how do I go about designing the envelope circuit I realise that it can be done with a diode with a capacitor and a resistor I also want to ability to use a jack instead of a mic via a chip as stated in post #29 I'll just use this because...
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm finding it difficult to find strait answers on google, anyway I have much more project time to work on my things so that's really good at least two hours per week on mondays maybe an hour extra in the mid week!!
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    is this good or bad thinking
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    do you filter and then put an envelope circuit to then output to the LM3914
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm struggling with it!
  20. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    If the signal out of the filter is like this does the output go to the positive side of the diode and the lower rail go to ground of REFERENCE GND
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