[sdiy] Sine VCO

[Michael Zacherl]

Hi,
I'd be interested too!

Since a waveformconverter for a good sinewave is 
rather componentintensive a set of "classic" VCOs 
for additive synthesis would be expensive (IMHO).

Besides linear FM (err .. did you mean linear?) 
are you looking for Oct./V characteristics as well?

How about modifying the charge/discharge part of 
the sawtooth circuit, to get a triangle instead of 
a saw and to smoothen it out afterwards?
(Just a rough, ugly, untested thought).

How clean do you need this sine wave? Has it to be 
an ideal one?

have a nice day,
Michael.

Rönnberg, Niklas wrote:
> I'm looking for a sine VCO. I don't want (or need) any other waveform from
> this VCO, but I guess that that is unavoidable. I also want the VCO to have
> an input for FM...
> I think that I saw a schematic once that was based on a LM13600. This VCO
> made a triangle wave, so maybe this would be a good start for a sine
> VCO(?).
> 
> Can anyone help me pointing out a schematic or giving a tip on designing
> this circuit?
> 
> Regards,
> 
> Niklas