Electrical Layout-to-Netlist

l2n_elec() builds a klayout LayoutToNetlist object from electrical port markers. It handles the electrical side of netlist extraction, complementing the geometric optical extraction.

How it works

1. Duplicate the layout — works on a copy to avoid mutating the original
2. Materialize port markers — for each cell in the hierarchy, ports whose port_type is in mark_port_types are written as kdb.Text shapes on their respective layers
3. Apply connectivity rules — layers from the connectivity sequence are connected together in the L2N engine
4. Extract — klayout runs its built-in extraction and error checking

Function signature

def l2n_elec(
    cell: RootCellLike,
    mark_port_types: Iterable[str] = ("electrical", "RF", "DC"),
    connectivity: Sequence[Sequence[kdb.LayerInfo]] | None = None,
    port_mapping: Mapping[str, Mapping[str, str]] | None = None,
) -> kdb.LayoutToNetlist:

Parameters

Returns

A kdb.LayoutToNetlist object with the extracted electrical netlist.

Port mapping

When port_mapping is provided, ports whose names appear in the mapping for their cell are renamed before materialization. This collapses multiple equivalent ports into a single canonical port name, preventing them from being marked as separate electrical nodes.

See Also