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Spectre simulation accesses to calibre view, not schematic

wjoon

Hi, I just want to show the difference between pre-simulation and post-simulation.

First, I extracted the calibre view from layout named 'nand2'.
Then create 'nand2_pex' file which includes schematic and symbol and the schematic is extracted by calibre view.

The simulation schematic file including 'nand2' and  'nand2_pex' symbols, and run by Spectre simulation.

But the pre and post simulation results are same.

I've done another try. I created another file named 'nand2_wo_clib' which does not include clibre view, then compare the simulation results of three symbols.
Finally I see the difference.

So, I found the problem that the Spectre access to calibre view not schematic view.
I want to fix it access to schematic view, and I'm trying to find out the solution.

Can I ask the way?


*Also the extracted Hspice netlists of 'nand2' and 'nand2_pex' are same.
(The virtuoso version is 6.1.8-64b.)

  • How are you running the simulation? In ADE? Which ADE are you using (ADE L, XL, Explorer, Assembler)? Do you have a config view to pick the views to use for simulation or do you just have a schematic testbench? If it's a config, you'd use the hierarchy editor to alter the views to use to switch between the representations, but if it's just a schematic, you'd use Setup->Environment and control the switch view list. You might be doing something else - there simply isn't enough info above.

    If the problem is with the Calibre extraction itself, I can't help too much (Calibre is not a Cadence tool, it's from Siemens EDA/Mentor).

    Regards,

    Andrew 

  • in reply to Andrew Beckett

    Yes, I use ADE L. 

    And I use the initial setting of the cadence.
    If I set a config view to pick the views, I want to know.

    And I think I use just schematic view.


    I see the 'switch view list' in Environment setting and it presented
    'calibre spectre cmos_sch cmos.sch schematic veriloga'.
    How do I switch the list?

    'schematic spectre cmos_sch cmos.sch schematic veriloga'
    Is that right?

  • in reply to wjoon

    The switch view list defines the search order for views to try as it traverses the design hierarchy - when it finds a symbol, it will try each of the view names in the switch view list in turn, and descend into the first view available. So with 'calibre spectre cmon_sch ... schematic" it will prefer "calibre" over "spectre" (normally a stopping view for primitive devices) over schematic. You can change the order to change the order of preference.

    Creating a config view and using that as your design in ADE gives you more detailed control over the views to use than a simple switch view list.

    I can't answer what is "right" because I don't entirely know what you want it to do!

    Andrew

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