[sdiy] more on which VCO

[James Patchell]

Well, here is my entry....

http://www.oldcrows.net/~patchell/synthmodules/vco.html

It is a very stable VCO, and I would say meets your requirements....plus, 
it is made from all easily attainable parts.



At 01:34 AM 6/12/2004 -0500, Mark Romberg wrote:
>ok...i have a set of specs that i want in a VCO, but i havent found a 
>design (or mulitple designs that look like they could be kludged into what 
>i want) online.  so i humbly put before you my specs, and seek a VCO that 
>can live up to the challenge:
>
>-square, sawtooth, sine, and triangle waves, preferably simultaneous 
>outputs (the tri wave is kind of an afterthought, i wont use it much so if 
>i cant have it, thats life in the big city. really its the saw thats hard 
>to find included, i've found several square/sine/tri VCOs
>-oscillator sync
>-frequency modulation
>-pulse-width modulation
>
>the VCO at midwest analog looks promising, but it lacks oscillator sync 
>and a sawtooth waveshaper (the basic waveform is triangle)
>suggestions, ready go.
>also, if there's some basic facet of analog VCO design that im missing, 
>like that oscillator sync is the same thing as FM or is just one 
>oscillator's output used as CV for the second, feel free to berate me.
>im new to analog synthesis and homebuilt electronics so i need to get the 
>stupid questions out of the way :P
>
>have nice days.

         -Jim
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http://www.oldcrows.net/~patchell

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