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selecting Q-value for lowpassfilter

Discussion in 'Electronic Basics' started by Britney, Oct 27, 2003.

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  1. Britney

    Britney Guest

    Hello, for lowpass second-order filter which has the transfer function
    H(s)=(w0^2) / (s^2+sw0/Q +w0^2), where w0 is the natural frequency.
    My question is, how should I choose a value for Q so that the phasedelay for
    the filter will be linear?
    The phasedelay is defined as t = -phi(w)/w, where phi is the phase.
     
  2. Luhan Monat

    Luhan Monat Guest

    Yo,

    I haven't clue. However, I would suggest posting this kind of question
    to <sci.electronics.design>. There, it will stand out among most of the
    other postings which should have gone to this newsgroup instead.

    Go figure!
     
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