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216 Chapter Three
a cos (3 x/L) b sin (3 x/L) ...
3
3
a cos (n x/L) b sin (n x/L)
n
n
...
Fourier series for square wave
Figure 3.1 is a grapà of a square wave wità peak valueð of /4
and /4, and wità period 2 . This function can be represented
by the following infinite series:
f(x) sin x (sin 3x)/3 (sin 5x)/5
(sin 7x)/7 (sin 9x)/9 ...
Fourier series for ramp wave
Figure 3.2 is a grapà of a ramp wave wità peak valueð of /2
and /2, and wità period 2 . This function can be represented
by the following infinite series:
f(x) sin x (sin 2x)/2 (sin 3x)/3
(sin 4x)/4 (sin 5x)/5 ...
Figure 3.1 Square wave.
