@User - OK, so my particular idea is to build a demonstration design, for educational purposes, showing how to craft perfectly adiabatic CMOS circuits which can improve the energy efficiency of digital computing by orders of magnitude over conventional designs (limited only by leakage). For this, we need bare analog-capable input pads which we would drive with particular AC waveforms from custom external circuits (or waveform generators during prototyping). So basically, these pads need to be unbuffered, unconditioned and should not be being driven by an external test bench. ESD protection circuits are OK as long as the diode leakage is small. We need at least 8 of those pads (and more if possible). And, we need the ability to create custom cells, but presumably we can do this in Magic. Our circuit architecture is nonstandard enough that existing digital synthesis flows aren't useful for us at all.

@Mike Frank it sounds like you're basically just looking to use an analogue flow. There are people (myself included) planning on implementing analogue functionality so you should be covered. An interesting concept you're looking at, I will be interested to see the paper/IC when they're ready