Hello,
I am running a mixed signal simulation where my standard cell instances are defined using a .cdl model file which contains information like this.
.subckt adc12_stdcell_ADDFHX4 CO S A B CI
M0 net76 net82 VSS VSS n18 l=0.18 w=0.96
M1 VDD net82 net76 VDD p18 l=0.18 w=1.44
M2 CO net119 VSS VSS n18 l=0.18 w=2.4
.............
M27 net131 net84 net138 VSS n18 l=0.18 w=1.52
M28 net137 B net138 VSS n18 l=0.18 w=1.36
M29 net137 net84 net88 VSS n18 l=0.18 w=1.52
M30 net138 A VSS VSS n18 l=0.19 w=1.41
M31 VDD A net138 VDD p18 l=0.18 w=2.1
.ends ADDFHX4
*.SCALE meter
.GLOBAL VDD VSS
The gates are just symbol views in Virtuoso. The model file is selected under the Hierarchy Editor using the Set Cell View --> Specify SPICE Source file to pick up the .cdl file.
So far I haven't been able to get AMS to recognise the .GLOBAL statements and so my VDD and VSS nets within the CDL standard cells are unconnected.
I've searched around on the Community but haven't hit the information I need.
Can anyone give me a few pointers?
Many thanks,
Matthew Cordrey-Gale