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  1. #1
    Newbie level 1
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    Coupled nets from parasitics spef file

    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.

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  2. #2
    Advanced Member level 5
    Points: 8,433, Level: 21

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    Re: Coupled nets from parasitics spef file

    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.
    Really, I am not Sam.



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