Hi,
Which CMOS process do you have? I recall that there is one xcell file in TSMC PDK. If you have TSMC PDK, you have a very good example.
Code:cellL cellL
cellR cellR
cellM cellM
They are the cell names for layout in the left column, and the cell names for schematic in the right column.
I have a good tutorial for you, which I got a few years ago. But that is written in Chinese. Can you read Chinese?
Best Regards,
Yawei