frequency transformation bp to lp

Discussion in 'General Electronics Chat' started by franticAAC, Nov 29, 2012.

  1. franticAAC

    Thread Starter Active Member

    Jun 25, 2012
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    1
    hi i've to design a bandpass active filter of 6th order PRB type, but i've a problem in the design procedure.
    In order to obtain the desired filter i need to convert the bandpass transfer function in a lowpass transfer function.

    Given:
    H(s)=K0*\frac{B0 + B1*T(s) + B2*T^2(s) + B3*T^3(s)}{1 + F2*T^2(s) + F3*T^3(s)}

    with: T(s)=\frac{k}{k+s}

    what are the step formulas in order to obtain the lowpass transfer function H(s)?
    Anyone could help me please?
     
  2. Audioguru

    AAC Fanatic!

    Dec 20, 2007
    9,460
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    What is "PRB"?
    Please write in full English words without abbreviations.
     
  3. franticAAC

    Thread Starter Active Member

    Jun 25, 2012
    30
    1
    primary_resonator_block
     
  4. Audioguru

    AAC Fanatic!

    Dec 20, 2007
    9,460
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    Thank you for telling its name.
    Homework?
     
  5. tshuck

    Well-Known Member

    Oct 18, 2012
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  6. franticAAC

    Thread Starter Active Member

    Jun 25, 2012
    30
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    @tshuck has found the same paper that i'm studying on.
    The problem is that in the design procedure i can't obtain the formulas used to risolve the bandpass to lowpass transformation.
     
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