passive filter

Discussion in 'General Electronics Chat' started by shin, Aug 24, 2008.

  1. shin

    Thread Starter Member

    Oct 16, 2006
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    If we want to design a passive lowpass filter, can we get its transfer just from the cutoff frequency and its attenuation without knowing the zeros and poles location?
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. hgmjr

    Moderator

    Jan 28, 2005
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    If you know the cutoff frequency and its attenuation that is often enough.

    On occasion, the phase response will need to be a consideration. If this is the case then the selection of the filter type will need to be carefully chosen.

    hgmjr
     
  4. shin

    Thread Starter Member

    Oct 16, 2006
    16
    0
    Actually, i need to design an automated software that will design the circuit from the user specification. So how can i calculate the transfer function from the cutoff frequency and its attenuation? My project actually is optimizing the circuit design by using Genetic Algorithm. From my understanding, the generel transfer function of a filter needs the zeros and poles location. But if possible, i dont want the user specify the zeros and poles value..
     
  5. Antonio

    Member

    May 29, 2007
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