Posts: 1 How to write the Fourier series up to Nth harmonic?

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The discussion focuses on writing the Fourier series in trigonometric form for a square wave with odd symmetry, specifically up to the 9th harmonic. The peak value is stated as 0.3 volts, with an average value of zero and a fundamental frequency of 1Hz. The correct expression for the Fourier series is confirmed as 4 * Amplitude / (π * N) * sin(N * t * freq), where N represents the harmonic number. The participants also reference a Wikipedia article for further clarification on square wave characteristics.

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red009
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I need to write the Fourier series in the Trigonometric form up to 9th harmonic

Fourier Series for Square Wave with odd symmetry
Peak value of 0.3 volts
Average value of zero
fundamental frequency of 1Hz

Is this right?

4*0.3V/(pi*N)*sin(Nt)? please respond I really need help and am very confused!
 
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Hello? Anyone there?
 
Hey red009 and welcome to the forums.

Do you know what the general expression is for all harmonics? If so, what terms of that expression should you keep for the range of harmonics you listed above?
 
is it 4*Amplitude/(pi*N)sin(N*t*freq)?
 
red009 said:
is it 4*Amplitude/(pi*N)sin(N*t*freq)?

From wikipedia we get the document:

http://en.wikipedia.org/wiki/Square_wave

Is that the form of your square wave or is transformed in some way?
 

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