12
Fourier Series
•
A periodic waveform can be written as:
–
f
(
t
) =
a
0
+
a
1
cos
w
t
+
a
2
cos 2
w
t
+
∙∙∙
+
a
n
cos
n
w
t
+
∙∙∙
+
b
1
sin
w
t
+
b
2
sin 2
w
t
+
∙∙∙
+
b
n
sin
n
w
t
+
∙∙∙
