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jk2007
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Homework Statement
What fraction of the energy of a square wave is in its fundamental? In its first five harmonics? First seven? Nine?
Homework Equations
the Fourier series of a square wave...
v(t) = ( 4V / pi ) ( sinw0t + 1/3sin3w0t + 1/5sin5w0t + ... )
also given a graph showing the frequency spectrum of pulses
at w0 4V/pi
at 3w0 1/3(4V/pi)
at 5w0 1/5(4V/pi)
at 7w0 1/7(4v/pi)
...
The Attempt at a Solution
Been working on this and wasn't able to find a solution... I'm not sure how I'm supposed to derive an equation for energy that I can use to solve the problem... I know that E is the infinitely bounded integral of (v^2)/R dt, but not sure how to apply this here with a Fourier transform made up of discrete pulses.
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