Need help with Sallen key circuit

Discussion in 'Homework Help' started by alialiali, Mar 3, 2009.

  1. alialiali

    Thread Starter Member

    Dec 12, 2008
    26
    0
    Hi every one

    Please I am trying to design band pass filter using sallen & key filter for the sum of the left audio the frequancy range of which is 23KHz to 53KHz

    Please I need to understand the calculation baesed on Fc=1/2piRC as I ahve to use equal values for Rs and equal values for C

    *pass band gain = 0
    *Gain flatness error = 1dB
    *Attenuation at twice the cut-off frequancy 12dB

    the sallen key filter should be secound order filter and I dodnt know how many secound order filter I'll need

    Many thanks
     
    Last edited: Mar 3, 2009
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
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  3. alialiali

    Thread Starter Member

    Dec 12, 2008
    26
    0
    thx alot
    but the website is very complecate for me
    I coulden anderstand most of the things so please can you expline it fro me
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    This comes from one of the links of the page I gave you.
    http://www.ecircuitcenter.com/Circuits/opsalkey1/opsalkey1.htm



    Greetings,
    Bertus
     
  5. alialiali

    Thread Starter Member

    Dec 12, 2008
    26
    0
    Many thank this is very helpfull
     
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