Using this table for Z Transforms with Discrete Indices
Shortened 2-page pdf of Laplace Transforms and Properties
Shortened 2-page pdf of Z Transforms and Properties
All time domain functions are implicitly=0 for t<0 (i.e. they are multiplied by unit step).
Shortened 2-page pdf of Laplace Transforms and Properties
Shortened 2-page pdf of Z Transforms and Properties
All time domain functions are implicitly=0 for t<0 (i.e. they are multiplied by unit step).
Entry | Laplace Domain | Time Domain (note) | Z Domain (t=kT) |
---|---|---|---|
unit impulse | unit impulse | ||
unit step | (note) | ||
ramp | |||
parabola | |||
tn (n is integer) | |||
exponential | |||
power | |||
time multiplied exponential | |||
Asymptotic exponential | |||
double exponential | |||
asymptotic double exponential | |||
asymptotic critically damped | |||
differentiated critically damped | |||
sine | |||
cosine | |||
decaying sine | |||
decaying cosine | |||
generic decaying oscillatory | |||
generic decaying oscillatory (alternate) | (note) | ||
Z-domain generic decaying oscillatory | (note) | ||
Prototype Second Order System (ΞΆ<1, underdampded) | |||
Prototype 2nd order lopass step response | |||
Prototype 2nd order lopass impulse response | |||
Prototype 2nd order bandpass impulse response |
Using this table for Z Transforms with discrete indices
Commonly the "time domain" function is given in terms of a discrete index, k, rather than time. This is easily accommodated by the table. For example if you are given a function:Since t=kT, simply replace k in the function definition by k=t/T. So, in this case,
and we can use the table entry for the ramp
The answer is then easily obtained
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