[sdiy] Top DIY VCO

[Scott Gravenhorst]

harrybissell <harrybissell at prodigy.net> wrote:
>just curious... why 'all discrete' ???   Its possible of course but the
>reason a lot of folks started using OPAMPS is that they are superior
>in some ways.  Well, they sure make good opamps anyway  (good for
>summing amp, expo converter etc...)

I agree, and it makes me curious, aren't the transistors in an opamp still
transistors?  

What differences could there be between discrete parts and transistors and
diodes in an integrated circuit that can affect the sound of something like
a VCO?  

Unless using discrete parts makes (for example) a VCO with a sawtooth
waveform that has a faster reset time than any other design, I don't see the
value in a discrete only design.


>
>H^) harry
>
>harrybissell wrote:
>
>> there is NO SUCH THING as a single, PHAT vco...
>>
>> plan on building TWO if you want PHAT   :^P
>>
>> H^) harry
>>
>> Frédéric Bourgeais wrote:
>>
>> > Hi all,
>> >
>> > I'd like to build some VCO, V/Oct with square, saw and pwdth outputs
>> > made only with discret componants. Good thermal stability, but it's not
>> > critical.
>> >
>> > I took a look around the web, but it's not easy to choose one design
>> > without hear one before.
>> > Does anyone may suggest me some schematics (URL) for a simple and PHAT
>> > sounding one ?
>> >
>> > Thanks
>> > ++Fred
>> >
>

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