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.global Line

General Form:
.global node1 node2 ...

The arguments are node names. These declared node names remain unaltered when subcircuits are expanded, thus the indicated nodes become accessible throughout the circuit.

For example, the substrate node of all n-channel MOSFETS in the main circuit and subcircuits can be tied to a node listed in the .global line. Then, substrate bias can be applied to all substrate nodes with a single source, conveniently located in the main circuit.

Stephen R. Whiteley 2017-02-22