Its started...

[Ingo Debus]

Tony Allgood wrote:
> 
> Hi all,
> 
> I wondered why Andrew wanted to get rid of his CEM3310s until today. I
> have lost the first 3310 from my poly.

I already fried 3 3310s and 2 (or 3?) 3340s.

> Now what I
> need is a pin for pin replacement for one. Perhaps based around
> Juergen's HADSR, in SM and... no, it would never fit, but it was a
> worthy ambition. If anyone works in a hybrid fab shop???

If there's a uP anyway in the system, one could consider a hybrid
envelope generator: the uP does all the control logic while the cap
charge/discharge is done analog, much like the CEM3371. JH's VCADSR
would boil down to one quad opamp (one opamp as comparator, compares the
output voltage with threshold CV), four trannies and a few passive
components. This would easily fit on a little PCB replacing the 3310.

Ingo