[sdiy] harmonic generator

[Magnus Danielson]

From: jorgen.bergfors at idg.se
Subject: Re: [sdiy] harmonic generator
Date: Wed, 6 Mar 2002 12:18:26 +0100

> 
> >My understanding is that a full-wave rectified (absolute value) sine wave
> >contains an infinite even harmonic series.
> 
> Yes, but it desn't have much higher harmonics.

What you get is only even harmonics falling of at -12 dB/Oct, or by 1/n^2.

> You will get a nice spectrum with only even harmonics, if you mix a sine
> wave with a sawtooth of twice the frequency. The sine should have 1.273
> times the amplitude of the sawtooth.
> 
> You can check the overtones of different waveform at this excellent site:
> http://www.falstad.com/fourier/
> 
> /Jorgen
> 
> P.S. Thanks to Magnus Danielsson and Mattias Rickardsson for help with this
> information.

It has been discussed at the SAS-list, so now you see what you miss by
not speaking (or at least read) Swedish! ;O)

It is not uncommon for discussions to spill over...

Cheers,
Magnus