frequency transformation bp to lp

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

  1. franticAAC

    Thread Starter New 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

    New Member

    Dec 20, 2007
    9,411
    896
    What is "PRB"?
    Please write in full English words without abbreviations.
     
  3. franticAAC

    Thread Starter New Member

    Jun 25, 2012
    28
    1
    primary_resonator_block
     
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Thank you for telling its name.
    Homework?
     
  5. tshuck

    Well-Known Member

    Oct 18, 2012
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  6. franticAAC

    Thread Starter New Member

    Jun 25, 2012
    28
    1
    @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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