Date:   1/29/2015 2:17:42 PM ( 9 y ago)
Hits:   3,184
URL:   https://www.curezone.org/forums/fm.asp?i=2233531

0 of 0 (0%) readers agree with this message.  Hide votes     What is this?

Second thing first - The sharpness of the leading and trailing edges of a squarewave do not cause "ringing at any and all frequencies." You are confusing a periodic wave with an impulse, or infinite impulse in the FFT world. That has energy at all frequencies, but only because it is not periodic. Leading and trailing edge sharpness *do* affect the shape of the harmonic field. The harmonic amplitudes defined by Fourier are theoretical limits; real world waveforms have lower amplitudes because the edges are not infinitely fast.

BTW, a triangle wave has no fast vertical edges, yet has same number of harmonics as a squarewave.

First thing second - Your view of how individual waves combine assumes that the rms values add linearly. They don't.

ak

 

<< Return to the standard message view

fetched in 0.03 sec, referred by http://www.curezone.org/forums/fmp.asp?i=2233531