expert problem..help......

[liuyying]

i do for the xor, but it come out with top ground problems.
what is the problem of top ground:?: :roll:

 

[john blue]

mind to explain further?

 

[cyberrat]

A lot further...

 

[liuyying]

for a 1-bit full adder, after i combine the sum circuit and carry circuit, i will come out with nmos problems during checking with LVS. And the LVS shows my GND connection have problems, but i dint see the problem on GND.

 

[cyberrat]

Can you post pics of your circuit?
And the errors you are getting.

Also the software used?

Then someone might be able to figure out what you are talking about.