Ring modulation: CA3080 circuit???

[Colin Fraser]

On Nov 11,  5:19pm, john.. wrote:
> Subject: Ring modulation: CA3080 circuit???
> Hello everyone,
> 	I'm about to start building some modules for my Digisound-80 and I
> thought that I'd start with a ring-modulator. I have seen mention of a
> single-CA3080 circuit in the archives, but no schematic....
> 
> Is there a schematic available for this???
> 
> this is just going to be a `warm-up' project - I'm going to build a set
> of analogue drum-voicing units (from the 808, 606, CR8000, 909)  and put
> them in a box with my MIDI-Trigger converter for a `real' drumstation :)
> 
>

The actual Digisound ring-modulator circuit diagram is in the AH archives 
somewhere I think. Its based on a balanced modulator IC (MC1496 ?) that you can 
get from Maplin for a couple of quid. 
I believe the Digisound module had two circuits, with just the 3 sockets for 
each, so you should be able to make a front panel that would fit in with the 
rest of your modular nicely. I have an old Digisound brochure I could check.
I'm sure this circuit will have better performance than a 3080 too.
I don't have web access at the moment so you'll need to look for it yourself, or 
if its disappeared I have a printout of it somewhere I could look out.


Cf