low pass filter analysis

Discussion in 'Homework Help' started by hunterage2000, Mar 27, 2011.

  1. hunterage2000

    Thread Starter Active Member

    May 2, 2010
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    If you were given the question:

    analyse the magnitude and phase of a 2nd order Butterworth low pass filter with cutoff point of 1000hz

    How you go about doing this?
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    I would look for it in Google Images where a graph will show the magnitude and phase at various frequencies related to the cutoff frequency.
     
  3. sharma@vivek

    New Member

    May 2, 2010
    9
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    use any filter design tool, amongst are MATLAb
     
  4. narasimhan

    Member

    Dec 3, 2009
    72
    6
    Use a standard text like oppenheim or wikipedia to first understand what butterworth filters are and how to design them. Then you can easily plot and analyse a 2nd order LPF yourself.
     
  5. hunterage2000

    Thread Starter Active Member

    May 2, 2010
    400
    0
    I have the denormalized transfer function of

    H(jw) = 1/1-(f/1000)^2 + jsqrt2(f/1000)

    just not sure what to do with this and how it applies to a bode plod
     
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