Reconstruction Methods to Obtain Inverse Stable Sampled Systems

It is shown that Fractional Order Hold and Pulse Amplitude Modulation signal reconstruction methods can be used to improve, in many cases, the zero properties of the sampled transfer function H(z) over the Zero Order Hold reconstruction. State-Space descriptions and algorithms are used throughout as they provide a convenient way to study H(z) for any sampling period T. In addition, the problem of how well the sampled H(z) models the continuous G(s) is discussed.