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Analog Layout: interdigitization

luca magnelli

Hi,

I'm approaching to analog layout with Virtuoso XL. I have to realize the layout of a simple current mirror (2 transistors) and, for matching purposes, I'd like to realize it using an inter-digitized (or common centroid) arrangements.

There is a way, in Virtuoso XL, to merge 2 or more instances in order to form an inter-digitated one? It seems to me that, starting from a schematic entry and generating the layout from this source, Virtuoso XL only gives separate instances and the only thing to do is routing them.

Can anyone show me the procedure for activating transistors inter-digitization in Virtuoso XL?

Thanks,

Luca

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