K
Kuan Zhou
Guest
Hi,
I am using SiGe 7HP technology. I used 2 as Multiplicity for
nfet in the schematic. In the layout, I connected Sources, Drains
and Gates of two identical nfets together. LVS shows the schematic
matches the layout.
However, when I merge those two Sources in the layout (like fingers),
LVS says
Multiplicity FET Parameters l/s l: 180e-9/180e-9 w: 4e-6/2e-6
nf: 2/1 m:1/2 gcon:1/1
Seems the extracted view has 2 for nf and 1 for m. Does anyone know
what's wrong? My purpose is to break skiny long nfets into multiple short
nfets connected by fingers.
Thank you!
sincerely
-------------
Kuan Zhou
ECSE department
I am using SiGe 7HP technology. I used 2 as Multiplicity for
nfet in the schematic. In the layout, I connected Sources, Drains
and Gates of two identical nfets together. LVS shows the schematic
matches the layout.
However, when I merge those two Sources in the layout (like fingers),
LVS says
Multiplicity FET Parameters l/s l: 180e-9/180e-9 w: 4e-6/2e-6
nf: 2/1 m:1/2 gcon:1/1
Seems the extracted view has 2 for nf and 1 for m. Does anyone know
what's wrong? My purpose is to break skiny long nfets into multiple short
nfets connected by fingers.
Thank you!
sincerely
-------------
Kuan Zhou
ECSE department