[sdiy] How To Make This Oscillator into a VCO

[patchell]

    Yes it can...look in a National Semiconductor data sheet for the
LM324.  There is a VCO that will produce a triangle that uses no OTAs.
In fact, this is what I built for my first synthesizer back in 1974.
Worked a lot better than the Paia 2720 oscilator...in some ways.

bill berzinskas wrote:

>    Thanks for all the good responses..  tons of good info..
>
>
>
> Next Question:   Can this be done without an OTA?  For the most part,
> i'm working with standard opamp pieces..
>
>

--
 -Jim
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