Application of continuous system design concepts to the design of sampled data systems
S. F. Schmidt · Transactions of the American Institute of Electrical Engineers Part II Applications and Industry · 1959
THE THEORY associated with the design of sampled data systems1 has progressed to the point where it is possible to design a digital controller pulse transfer function so as to obtain an over-all system pulse transfer function which will meet certain specifications such as being stable, and physically realizable; having a minimum settling time in response to a given input; having ripple-free operation after a short transient, etc.