Sorry for the lesser details. I am using spectre.I have a problem to use global power and ground in Cadence6.
I use vdd! and vss! in my schematics. They are recognized in different hierarchy in schematic simulation, so no problem. However, they are a problem when I would like to run a testbench simulation.
Either I use vdd and gnd symbols and directly connects to a block of the circuit or another way is giving pins and name them vdd! and gnd!. In either way, there will be no physical nodes to connect to a power source and ground. There is no problem with spectere simulaion, but when I try to run a testbench simulation the problem arises.
I know there is some method where in the testbench simulation ,I edit the properties of the symbol and use netset and assign them to vdd and gnd. But when i tried this with the inverter the expected inverter output is not seen.
Could you please tell me the steps as in how assign the local values to the global ones?