lpeh.tcl

magic/lpeh.tcl

Hierarchical parasitic extraction, run by make lpeh.

Same as lpe.tcl without the flatten, extracting into lpe/exth, and with two extra options:

ext2spice format ngspice
ext2spice resistor off
ext2spice cthresh 0.1

The capacitance threshold is ten times looser than the flat flow (0.1 against 0.01) and resistors are off, because a hierarchical extraction is used when the flat one is too big to finish. The netlist keeps the cell hierarchy, which makes it much smaller and much faster to simulate, at the cost of missing every coupling capacitance between cells.