Archive of the former Yahoo!Groups mailing list: MOTM

Hi Listers......

Some notes on inverters/buffers of the past......

ARIES323mixer had an invert switch on each section.
It could de A-B and A+B outputs.

I have a description of an Aries "Window Comparator Module"
No schematic, just description, but it doesn't seem too hard to build.

PAIA 2720-12 was a buffer/inverter.

PAIA 9710 Dual VCA/Balanced Modulator's normalized
control voltage input inverts voltage for
automatic panning of VCA's.

The Format1 synth used a CA3080 and fet as "buffer".
....also, used ca3080 and 741(buffer) for VCA.

OAKLEY Tripple Attenuator Mixer has "reversing" attenuators.

BLACET has a Quad VCA/Mixer with attenuators...

R.Brewster drew a MOTM compatable "Mixer-Comparator" module.

R.G. Keen(GeoFX) draws a "Polarity reverser" sim to 2720-12.

Roman Sowa draws a "Modular CV Input Attenuator-Inverter".



i was thinking of an inverter/buffer like the 2720-12.

that is, switchable: normal/inverted.

also, a "gain" switch--such as x1 x2 x4?
this way it could be a sort of preamp also.
i've been working on this idea for a while.
nothing built as yet...
stay tuned
tb