EQ/Spectrum Analyzer

Discussion in 'Homework Help' started by sausages, Mar 13, 2008.

  1. sausages

    Thread Starter Member

    Mar 8, 2007
    23
    0
    Hello,
    I have recently been set an assignment to design and test a distortion unit, simple 8-1 mixer and what I think is a graphic equalizer.

    One of the questions states:
    " 1.Design and construct apparatus for splitting an audio stream into three different spectral bands. "

    Would I be correct in thinking that if I use 3 filters set at certain frequencies, i.e. LP, HP and Band Pass , that I can then use these outputs to give 3 different spectrums?

    For instance I found a graphic equalizer schematic on the net.
    If you look at thoughts.jpg you can see that it says to run circuits in parallel for required number of filters.

    So in summary would it be okay to use 3 of these such circuits ( i.e. that which is in dotted lines ) with correct values for C's and R, to give a bass, mid and treble output?

    I realise my post is a bit muddled but any help would be much apreciated. Thank you,
    Sausages
     
  2. sausages

    Thread Starter Member

    Mar 8, 2007
    23
    0
    sorry I forgot to stick the photos up
     
  3. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    I think user "Audioguru" is pretty much an expert in this, hopefully he has time to give you some help.

    Steve
     
  4. sausages

    Thread Starter Member

    Mar 8, 2007
    23
    0
    audioguru, sounds good :D
     
  5. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    There are many ways to make an equalizer.
    Yours has important parts missing and has the input polarities backward for the gyrator opamp.
     
  6. sausages

    Thread Starter Member

    Mar 8, 2007
    23
    0
    Thanks for the reply. I've been asked to split one signal into 3 parts, high low and band. So would it be okay to take the outputs of the three opamps , these being high low and mid?
     
Loading...