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<p>When I sed 'VCO' I did not mean a full-featured volt per octave
VCO. I literally meant an oscillator that has voltage control. Cv
in, triangle and square out, thats it. thats what the 566 did.
that is what I want. 8 pins, 5 passives, and you're in business.
thats what the 566 brought to the party.</p>
<p>-t-i-m-b-o-<br>
</p>
<br>
<div class="moz-cite-prefix">On 3/19/2018 9:21 AM, Mattias
Rickardsson wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAP92RBXPnv=7jtKnXTTGe5c_JpiNbuisF4xuNuUiY57fZkzrmA@mail.gmail.com">
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<div>Some thoughts about the dream VCO discussions here:</div>
<div><br>
</div>
<div>What would be the main reasons for wanting a tiny VCO IC?<br>
</div>
<div>I can find it hypothetically attractive, sure, but given
that it will never have many features AND a small size at the
same time, I'd almost always need to add stuff outside in the
end since you rarely want just the basic functionality. If I'd
use a dedicated VCO IC I'd rather have some features that are
sometimes not in use than having to add near-basic
functionality with external components. The only true reason
for a small chip that I can come to think of is cost. I guess
it somehow scales with size in IC fabrication?</div>
<div><br>
</div>
<div>Making wishlists with VCO features, ending up on the 3340
specification from 38 years back... aren't we missing
something? :-)=</div>
<div>Many modern analog oscillators (both in modulars and in
hardwired synths) have other features than the ones we had in
the '80s. This should be reflected a bit in the wishlists we
make for VCOs today, even if most of these features could be
added outside the main chip. Exponential and linear CV should
be mandatory, triangle/sawtooth/square outputs as well - and
I'm thinking that a triangle core would be the way to go, even
if proper sync needs to be dealt with in a less obvious way.
That said, we're still stuck in 1980. Sine shaper, thru-zero
FM, what more is desired for the synthesists of today? :-)</div>
<div><br>
</div>
<div>Btw, Tim P, that negative expo CV allowing a single
inverting CV summer is a smart choice. What about the double
cap pins in your suggested pinout? Do they give a better
solution than the cap-to-ground used in both CEM and SSM ICs?</div>
<div><br>
</div>
<div>/mr</div>
<div><br>
</div>
</div>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
--Tim Ressel
Circuit Abbey
<a class="moz-txt-link-abbreviated" href="mailto:timr@circuitabbey.com">timr@circuitabbey.com</a></pre>
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