transfer function.

Discussion in 'Homework Help' started by Geney, Sep 6, 2012.

  1. Geney

    Thread Starter New Member

    Apr 2, 2012
    18
    0
    why is the transfer function considered as the ratio of laplace transform of output to input. why not z-transform??
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,138
    1,789
    Because it is the appropriate form for systems that operate in continuous time. Nothing else does what it does, it is unique in that regard.

    The z-transform is for sampled data systems that operate in discrete time. Again nothing else does what it does either.
     
  3. WTP Pepper

    New Member

    Aug 1, 2012
    21
    6
    With S tranfer functions, you can immediately see the effect on the output.
    With Z transforms you cannot until the next sample of the signal.
     
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