4th order Multi feedback bandpass filter

Discussion in 'The Projects Forum' started by djstar, Jan 11, 2015.

  1. djstar

    Thread Starter Active Member

    Jan 26, 2008
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    0
    Hi,

    As part of a university project i would like to build an active 4th order filter. Using analog devices filter wizard i can design a MFB bandpass filter with the calculated component values . However from a learning point of view i would like to know the formulas of how they were determined.

    on the internet there are plenty of websites listing the equations for a single opamp 2nd order filter, however i have not come across any equations for a 2 opamp 4th order filter.

    any one have any idea why i can find some information on calculating these equations
     
  2. joeyd999

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    Jun 6, 2011
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  3. bertus

    Administrator

    Apr 5, 2008
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