Fig. 2.
Graphical illustration of the functions of |$u(t)$| (top), the delayed signal |$u(t-r)$| and the sampling instants (bottom). The figure is reproduced from Astrom & Wittenmark (1997).
Graphical illustration of the functions of |$u(t)$| (top), the delayed signal |$u(t-r)$| and the sampling instants (bottom). The figure is reproduced from Astrom & Wittenmark (1997).
