EE Pro for TI - 89, 92 Plus
Reference - Transforms
16
Chapter 38
Transforms
This section accesses a series of tables containing transforms of common interest to electrical engineers. The
transforms are listed as three topics - Fourier, Laplace and z-Transforms. Each topic contains information
categorized under three sub-topics - Definitions, Properties and Transform pairs. All formulae can be viewed in
Pretty Print equation-display format. These sub-topics are not interactive, i.e., one cannot specify an arbitrary
expression and expect to compute a transformed result.
38.1 Using Transforms
When the Transform section is selected, a dialog box is appears. To choose a topic, move the highlight bar using
D
or
C
keys and press
¸
(alternatively, press the number associated with the topic).
1. Select Fourier Transforms, Laplace Transforms, or
z-Transforms.
2. Select Definitions, Properties or Transform Pairs
3. Use the
D
or
C
keys to move to the transform line
desired.
4.
The forward transforms are displayed by default.
Pressing
†
toggles between the forward and
inverse
formats.
5. Press
B
to view the transform property in Pretty Print.
•
Information is presented on either side of the colon as shown below. The term on the left side of
the colon, F(
ω
) represents the function in the frequency domain, while the right side of the colon
represents the exact definition for F(
ω
) in terms of the time domain function f(t), integrated over
all time modulated by e -i
⋅ω⋅
t.
Forward and Inverse Formats
•
The information can be displaced in the inverse (as opposed to forward) form, meaning that the
information on either side of the colon changes positions when the Inverse key
†
is pressed. A
‘
é
‘ symbol appears in the
†
tool bar to indicate the inverse form of the transform function is
being displayed.
F
f t e
dt
i
t
ω
ω
b g
b g
c
h
:
⋅
− ⋅ ⋅
−∞
+∞
z
Forward Fourier Transform