Ring Modulators

[Magnus Danielson]

> 
> >   Date: Fri, 15 Nov 1996 06:32:10 -0600
> >   From: majmoog at synthfool.com (Kevin Lightner)
> >
> >   What are the differences between 1494, 1495, 1496, 1595, etc?
> >
> >1496: Basic parts you need to build a Gilbert multiplier.
> >
> >1495: A 1496 with an extra diff-amp thingie to both make it more
> >linear and avoid that potentially annoying level shifting you need to
> >do to bias the upper transistors.
> >
> >1494: A 1495 with a built-in voltage regulator and a differential
> >current converter circuit for the output.  (Ie., the output is a
> >single-ended current to ground instead of a differential pair of
> >currents to Vcc.)
> >
> >The 15xx IC numbers are military temperature versions of the 14xx
> >numbers.
> >
> >  -- Don
> 
> Thanks, this helps quite a bit, Don.
> 
> However, here's my dilemna-
> 
> I have a lot of raw, usused Polyfusion PCBs. Many of them are dual ring
> modulators.
> They would like to have 1494's and 4739's in there. I have been able to
> substitute the 4739 fine (with very grateful thanks to John Simonton of
> Paia who make a small header board with a NE5532 instead. However, I have
> no schematic for this module and thus have no pinout for anything but a
> 1496. Can I sub a 1496 for a 1494? Can a header board be used that swaps
> pins around. The Polyfusion's have complete trims per RM, so itmight help
> the cause, but I'd hate to see these boards go to waste.

My local we-got-it-all shop still says they have MC1496G chips, do you want me
to go and pick some up for you?

> I also have enough boards and panels to make a 16 stage by 9 row sequencer.
> Anyone wanna tackle making such a beast? I don't think I'll ever have
> enough time, but I'd hate to see all these boards got to waste.

Hmm... how about a trade maybe?

Magnus