Soft sync and medicine to cure it.

[Haible Juergen]

	>Juergen or  (others) ,did you got any improvment doing so
	>in your's designs? And has any one done any soft sync measures?

I don't know. I have done it awfully wrong one time, but that didn't have
anything to do
with the shared expo converter. (I changed the layout for the VCO cores to
get rid of a bad soft sync problem, but - ignoring the soft sync issue
initially -
I had started with the worst layout possible - quite embarrassing in
retrospect.)

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.

All my other VCOs don't share a chip for their expo converters, so I've just
concentrated on power supply decoupling to avoid soft sync.

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.)
I think I will try the "noisy psu" method then.

JH.