Soft sync and medicine to cure it.

[jhaible]

> >I have one other circuit that is more or less a direct clone of the
> > >Oberheim SEM's VCOs (with shared CA3086 array), and I never had >reason
> >to complain about locking there.
>
> Ok, what about the Rbe/Vce linearity, any problems with that?

Not in my application (simple audio range VCO). But I've added
(mis)tracking pots on the front panel anyway, to make the oscillators
more "alive" if that is needed.


> >When I will ever build that PolyModular, soft sync might become a
>serious
> >issue. (But then again, I will not have shared expo >converters there
> >either.)
>
> Is there any performance related issues in not to have
> shared expo converters in your design decision??

Yes - they will be V/Hz !  (;->)
There might be an expo multiplier in each VCO nevertheless, but then it will
be a not too temperature sensitive one (just for detuning, i.e. no big range
for the tempco to strike) - see MS-20 or JH-720 for details.

JH.