Ring Modulators

[Kevin Lightner]

>   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.

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.

-Kevin