Re: Little addition.

CBFalconer wrote:

> Just do a Fourier analysis. Well known results for square and
> triangle waves. This is why you can generate a sine from a divide
> by 6 counter and have no harmonics below the 5th in the output,
> apart from scaling resistor tolerances.

It was necessary for a self-test because I did't work before with
measuring THD. I already connect square-wave generator to THD metter
and check. Up to 30th harmonics looks like mathematics model. :)