@Tim Edwards when I do parasitic extraction in

magic

, I sometimes get lines like

C542 VDD.n519 0 0.02fF $ **FLOATING

Question: • Why is this happening? (in other words, what does “FLOATING” mean?) • Should I keep these entries, or can I safely prune them from the netlist?

"Floating" generally means that there is a capacitance that connects to a node that is not itself connected to any devices. I'm not sure if ext2spice is aware of the tree of nodes, and might be adding that comments to nodes that are in the middle of the network, and shouldn't be marked that way.

It looks like it is a tree-unawareness issue, as the nodes of these caps are connected to other stuff.

Can you find the co-ordinates of the device in the ext file? (divide by 200 to get um).