[sdiy] Question for the sages...

[Chris Randall]

Hey, all:

I have a rather mundane question, but (like all my previous questions) one
that is probably easily answered. Is there such thing as a simple circuit
wherein you have an input for a control voltage, and (say...) a
potentiometer for setting a split point, where all voltages over that point
are sent out one output, and all voltages under that point are sent to a
second output?

This seems like such a simple (and usefull) concept for a module, but I
can't for the life of me find a module or example circuit that does such a
thing, which leads me to believe that it's not simple at all. Thanks in
advance for any help on this matter.

-Chris Randall