Hi, I did LVS on my complete design. I get everyth...
# ieee-sscs-dc-24
u
Hi, I did LVS on my complete design. I get everything matched except my substrate are all floating although I had assigned labels to both bulks of nmos and pmos. The nmos is extracted with VSUBS as the bulk terminal. Does anyone know how to connect the bulk terminals?
m
@Utkarsh Sharma Can you share your lvs results?
u
Please find gds and extracted file attached.
m
@Utkarsh Sharma There is no text on either of the hierarchies extracted. I suggest that you add ports.
u
When you read the gds using magic, don't you see GND label on the guard ring around the mosfets?
I had ports attached but when I extract I don't know why it just ignores that connection
m
The ports are not at the top level. They are inside subcells that are not hierarchically extracted
u
I see. But the port connected to bulk isn't identified inside the subcells? It is always VSUB?
m
If the bulk connection is unlabeled, I believe it defaults to
VSUB
.