check delay unit

1)delay unit structure

2)verify the delay requirement by accusim before layout

-run accusim with command " accusim s1238_delay/accusim"

-set model library

-setup analysis

-setup forces

-result

3)verify the delay requirement by accusim after layout

(Note: To do this step, you must finish circuit layout first. )

-extract mask lumped parameters from layout (i.e. write back annotation file) see file tree

-Import back annotation file

-follow the steps in above "step 2)verify the delay requirement by accusim before layout" and get the result