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NoPhys Property: Property Number 5

When the nophys property is applied to an electrical device or subcircuit, that device or subcircuit is assumed to have no physical implementation and is ignored in the algorithm that associates electrical and physical devices and subcircuits. A device or subcircuit with this property has no dual in the physical layout, and its terminals will never be placed in the physical layout, where they would otherwise be visible with the Show Terms command. Devices and subcircuits with this property will be ignored in LVS testing.

In order to actually simulate a circuit that has been extracted from the physical layout, it is necessary to add sources and perhaps other devices, which have no counterparts in the physical layout. In general, this will cause LVS errors in subsequent LVS runs. The nophys property can be added to the additional devices to avoid these errors.

The numerical value of the property is 5. The property string is ``nophys''. Xic will always set the property string to this value. Devices inherit this property from cell definitions in the device library file. The format is

5 5 nophys;


next up previous contents index
Next: Special Escapes Up: Device Properties Set By Previous: Other Property: Property Number   Contents   Index
Stephen R. Whiteley 2006-10-23