exponential rising (was Re: definition of Syncing)

[Patrik Erikson]

At 16:18 1996-11-26 -0600, you wrote:

>>In a sawtooth VCO, like for example the Elektor Formant the waveform is
>>generated by a linearly rising voltage across a capacitor, which at the
>                ^^^^^^^^^^^^^^^^^^^^^^^ 
>>proper level discharges by a transistor switch. This is activated by a
>>Schmitt-trigger (7413).
>
>curious question (possibly stupid, but who knows?): what would it sound like
>if you had an exponentially rising voltage across that same cap? interesting
>sounding waveform or no?

An exponentially rising waveform across a cap.???  That's the inverse
function to the caps' normal behaviour, isn't it? Any ideas how to do
that???  Anyway, an exponentially rising waveform should look something like: 

    |    |    |    |    |    |
    |    |    |    |    |    |
    |    |    |    |    |    |   
___/|___/|___/|___/|___/|___/|__

...and iv'e got a feeling it would sound similar to those "spaced sawtooth"
waves of a Formant. Propably even a little 'thinner'... Hey, I think my
Casio Cz101 got something like that, as well as a log curve too!

                    
                Peace!

                /Patrik



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