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Math Help - Z - transform 1/z-1

  1. #1
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    Z - transform 1/z-1

    Hallo,

    i would like o ask you one question.
    I have a little question from this theard
    is there an inverse Z transform for: 1/z-1 ?

    i have a model in matlab and i am using discrete transfer fcn. it using z-transfor with this form 1/z-1 . at input are numbers and at output is one number that is a simple sum of inputs..for example inputs are 1, 2 , 3 and the output of this function is 6 .. everything is fine but i dont know how this fcn calculate it.

    i think the sequence will be like this: 1*1^(-1) + 2*1^(-2) + 3*1^(-3) = 6 but im not sure its correct. can by the "z"=1? or what exactly is this "z" mean in this formula or in the sum.

    thank you very much. i hope its easy but i realy wondering about it a lot.
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  2. #2
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    Slovakia
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    Re: Z - transform 1/z-1

    I have found a document in which is this :


    so my question is can be the "z" = 1 ? or no. if yes then my sample above is correct? plz help me i dont kow much about this math.
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