[sdiy] saw/ramp from square?

[Ingo Debus]

Am 01.01.2009 um 13:02 schrieb Magnus Danielson:

>>>
>> Yes, Elektor had a square-to-saw converter that worked independent  
>> of frequency. I could dig out the schematic if you like.
>
> You could use a feedback loop in combination with a peak-detector  
> such that previous cycles saw-peak is sampled and controlling the  
> charge-current. This will cause some amplitude modulation but it  
> could be reduced to some degree, and as always with peak detectors  
> this would be most significant at low frequencies. If the peak  
> lowpass filtering was adapted such modulation could be reduced to a  
> minimum.

Yes, I think it worked that way. I'll send the article to Magnus via  
private mail.

Ingo