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

  1. Jan 15, 2012 #1
    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!!!
  2. jcsd
  3. Jan 15, 2012 #2
    Hello? Anyone there?
  4. Jan 15, 2012 #3


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    Science Advisor

    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?
  5. Jan 15, 2012 #4
    is it 4*Amplitude/(pi*N)sin(N*t*freq)?
  6. Jan 15, 2012 #5


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    Science Advisor

    From wikipedia we get the document:


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