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Extract parasitic capacitance of MOSFET

Duy Hien

Hi everyone,

I tried to extract parasitic capacitance of MOSFET. I use Cadence IC615, in ADE L: Result -> Annotate -> Show parasitics. And what I see is:

Error* hdbGetLibName: argument #1 should be a hierarchical database configuration object (type template = "h") - nil
<<< Stack Trace >>>
(... in _mspsConfigToSchExt ...)
(... in _mspsInitConfData ...)
(... in _mspsGetConfData ...)
(... in _mspsGetSessionParCV ...)
(... in _mspsBackAnnotate ...)
(... in _mspsBAPushHilight ...)
_mspsBAPushHilight(path schCV ses)
when((_mspsIsSchInWindow(window(ses)) && (_mspsFlowIsEnabled ses ?flow flow)) (path = strcat(geGetInstHier(&) "/")) if(index(path "//") then (path = "/")) (schCV = geGetWindowCellView(window(ses))) _mspsBAPushHilight(path schCV ses))
foreach(ses (sessionContext->sessions) when((_mspsIsSchInWindow(&) && (_mspsFlowIsEnabled ses ?flow flow)) (path = strcat(& "/")) if(index(path "//") then (path = "/")) (schCV = geGetWindowCellView(&)) _mspsBAPushHilight(path schCV ses)))
progn((sessionContext = _mspsGetSessionContext(sessionId)) foreach(ses (sessionContext->sessions) when((& && &) (path = &) if(& then &) (schCV = &) _mspsBAPushHilight(path schCV ses))))
(val = progn((sessionContext = _mspsGetSessionContext(sessionId)) foreach(ses (sessionContext->sessions) when(& & & & &))))
let((val prevFlow) (prevFlow = _mspsGetFlow(sessionId)) _mspsSetFlow(sessionId flow) (val = progn((sessionContext = &) foreach(ses & &))) _mspsSetFlow(sessionId prevFlow) ... )
_mspsWithFlow(sessionId flow (sessionContext = _mspsGetSessionContext(sessionId)) foreach(ses (sessionContext->sessions) when((& && &) (path = &) if(& then &) (schCV = &) _mspsBAPushHilight(path schCV ses))))

I don't know what these codes mean. Please explain it to me. Thank in advanced.

  • I believe (from a quick scan of the reported issues) that this can happen if you are not descended into a schematic view that corresponds to an out-of-context view alongside an extracted view. In other words, you need to descend into the schematic view corresponding to your extracted view.

    If that's not it, please contact customer support so that we can look at your data with you.

    Regards,

    Andrew.

  • Dear Mr. Beckett,

    Thank for your time.

    I ran a basic DC simulation: Save DC Operating Point

    I didn't descend into any symbol but the error still happened, I cannot see the parasitic.

  • I'm not that sure how the menu appears (it should be greyed out). The Show Parasitics menu should only appear (and only is useful) if you have:

    1. Done a parasitic extraction using QRC
    2. Simulated using the extracted view that was produced
    3. Descended down into the schematic view corresponding to the extracted view (usually referred to as "out of context"). This part of the check was only added during an IC615 hotfix, so maybe you're using too early a version for this.

    Clearly in this case you are at your testbench level rather than in the out of context view. In fact I'd be surprised if you've done a QRC extraction here -  so that's why I can't work out how the menus have appeared at all!

    Kind Regards,

    Andrew.

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