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Connectivity->Update->Layout Parameters problem

pham777

Hi,

I am using virtuoso XL in cadence ic615.06.15.151. I noticed that Connectivity->Update->Layout Parameters do NOT update multiplier

parameter m of device in schematic. As a result, if schematic has been changed, and you tried to update layout parameters corrresponding to schematic, you are going to miss this kind of change, and you're going to find out when you run LVS. That's a big hassle. Is it a way to get around this ??

Thanks,

HP

Parents
  • I tried this now in my environment and it works as it’s supposed to do.
    Even if I have not worked intensively with layout XL over the last couple of
    years I wouldn’t expect the tool to behave different.
    Why the m (multiplicity) factor is treated differently form other parameters like width, length or number
    of fingers, which are all updated with the "update layout parameters", is because m defines a m times physically
    separated devices in parallel. In this case it is an extra component and some extra nets, parallel wiring for S, D, G for e.g.
    a MOS device. So you need in fact "update components and nets".
    This should it make more clear.

     

Reply
  • I tried this now in my environment and it works as it’s supposed to do.
    Even if I have not worked intensively with layout XL over the last couple of
    years I wouldn’t expect the tool to behave different.
    Why the m (multiplicity) factor is treated differently form other parameters like width, length or number
    of fingers, which are all updated with the "update layout parameters", is because m defines a m times physically
    separated devices in parallel. In this case it is an extra component and some extra nets, parallel wiring for S, D, G for e.g.
    a MOS device. So you need in fact "update components and nets".
    This should it make more clear.

     

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