Coupled nets from parasitics spef file

[bhargavah]

Hi,

What are the possible cases of an D_NET being coupled to another net.

One case is that it is directly under the CAP section of the D_NET like:

D_NET a <whatever_value>
*CONN
...
CAP
1 a b:1 <whatever_value>
2 a c:2 <whatever_value>
...
...



In above skeleton case, D_NET 'a' would be coupled to nets b and c.
I am sure that there are other cases from where D_NET 'a' could be coupled to.

What are those cases? If D_NET 'b'(other than the one in skeleton) is coupled with D_NET 'a', then does it mean that 'a' is also coupled to 'b'? Basically, I wanted to know if there are any cases like that.

Thanks.

 

[ThisIsNotSam]

I am not sure I understand the question. If you are asking if C is counted twice, the answer is yes. You have A->B and B->A listed as being separate capacitances with the same value.