MOTM

In a message dated 5/19/2000 6:06:28 PM, djthomaswhite@... writes:

>PS. I am planning to make a small set of classic Curtis (CEM) chip modules
>for the fun of it. Does anybody have any experience in this area or basic
>information to make a reversible attenuators for say...
>all of the inputs on a VC ADSR
>
>Or is this way too complicated to be simplified this way? Thanks
>DJTW

Hi Thomas,

I have (at least) one of each of the classic CEM modules working now. They 
are all modified PAiA EKx series modules -- I've got a bunch more awaiting a 
finished enclosure. I'm so enamored of my idea of a reversing attenuator on a 
few inputs of a VCEG as I described a few months ago (and stooge approved 
too!), that I've changed all my graphics to accommodate my idea. 
Unfortunately, I haven't figured out a good way to limit the CV inputs to 
those required (I think it's 0V to 5V) by the CEM 3310 -- you wouldn't want 
to damage the IC by allowing a negative or too positive voltage at the CV 
inputs to the chip. I don't know how to do this, especially while maintaining 
the CV accuracy. If anyone has any thoughts, I'd love to hear them.

JB