SPICE AC analysis -- multiplying or dividing signals

Does anyone know how, in SPICE (LTSpice, SIMetrix, etc.), one goes about
multiplying or dividing two voltages in an AC analysis?

I have an arbitrary voltage generator device ("B"), but for non-linear
equations such as V(node1)*V(node2), there's some linearization that occurs
and I usually just get 0v output as a result rather than a multiplication.

After simulation I have no problem *graphing* something like
V(node1)*V(node2), but what I wanted was to create a new node that presented
that signal...

Thanks,
---Joel Kolstad


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