Virtuoso XL Layout Editor User Guide

Generating Your Layout with Virtuoso XL Layout Editor

The cloned structure is placed in the layout. The Placed list box lists all of the cloned devices.

Troubleshooting

If the target cannot be cloned, an outline of the layout structure does not appear and a message box opens.

You need to check whether

The structure or part of the structure that you selected as the target already exists in the layout, as if, in the example below, R1, R2, and Q1 in the layout were the source components and R4 (which is already implemented), R5, and Q2 were the target components.

Virtuoso XL Layout Editor User Guide

Generating Your Layout with Virtuoso XL Layout Editor

The connectivity structure of the source and the target is not the same; for example, if you chose R1, R2, and Q1 as source components and R6, R7, and Q2 as target components.

vcc!

R4

gnd!

The master cell of the source and the target instances are not the same

More source components are selected than target components; for example, if you selected R1, R2, and Q1 as source components and selected only R4 and Q2 for target components.

gnd!

Virtuoso XL Layout Editor User Guide

Generating Your Layout with Virtuoso XL Layout Editor

The properties of the source and target instances are not the same; for example, you could not use R1 and R2 in this diagram to clone R4 and R5 because their resistance value properties are different.

vcc!

gnd!

The target instance can have properties that are in addition to the properties of the source instance, but the target instance must have all the same properties with the same values as the source instance has. In the example below, you can use R1, R2, and Q1 as source components to clone R4, R5, and Q2 because the targets have

Virtuoso XL Layout Editor User Guide

Generating Your Layout with Virtuoso XL Layout Editor

the same properties and values as the sources, even though one of the targets has additional properties.

vcc!

gnd!

You can assign the property lxIgnoredParams to source instances with properties that are different from the target instance properties, so that the source instances can be cloned successfully as target instances.

Cloning Using Multiple Cellviews

You can place a clone in a different layout from the one in which you selected the source

You select the all the source objects from the layout from which you started the

Clone command (or the corresponding schematic)

The second layout has the same connectivity source as the first layout

To clone an object in one layout cellview into another layout cellview that has the same connectivity source, follow these steps.

1.From the layout window, choose Create – Clone.

2.In the layout window from which you started the Clone command (or the corresponding schematic), select the structure you want to copy (the connectivity source) and press Return.

The Cloning form appears.