SV: Re: SV: Re: [sdiy] Buchla osc , Tri cores skew!

[Ken Stone]

>
>--- Ken Stone <sasami at hotkey.net.au> skrev:
>
>> 
>> While the frequency is stable, the waveform should be symetrical. During a
>> sweep, it CANNOT be symetrical. For an analogy, think Dopler shift.
>
>I think you havent understand the initial issues of the question.

No. You miss understand my answer. Dopler was an analogy, not an explanation.

>At any instance of frequency change the wave is supposed to
>be symetrical, ie the rate of charging (upramp) and disscharge
>(downramp) is equal. Should be anyway, if its not, it skews, if it skews
>one ramp is shorter then the other wich results in a lasy saw wave,
>i dont think that has anything to do with doppler effects.
>The effect produced if large is just a wierd type of PM! 

The problem here is that "an instance of frequency change" doesn't exist, or
if it does, it is infintesimally short.
During a sweep - i.e. frequency being affected by a constantly changing
control voltage, each successive part of the waveform will be under the
effect of a slightly different voltage. There is no way for the up and down
ramps to be clamped as symetrical pairs. In fact, if the frequnecy is low
enough and the sweep voltage fast enough, the "straight" segments of the
triangle wave will become noticably curved.
Ken

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Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
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