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create a new switch for variable acces using ocean script

C4n0s4
Hi everyone! I would like to create a new switch that's is very similar to sp2tswitch (analogLib). The only difference between them is that i could assign a variable name instead of having to go to the window component and acces components parameters directlly. By the way, the idea is to control the switch using a variable in a ocean script. How can i do that? Is that possible? Best regards, Canosa
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  • First of all, I'd like to check why you're using this component. The historical reason is usually because people are trying to analyze stability by closing the loop during DC and opening it during AC - but you'd be far better off using spectre's stb analysis which analyzes the loop gain of a loop whilst keeping the loop closed all the time. Perhaps you're doing something else, but this has tended to be the main reason why people used this component.

    However, the issue you're facing is because the switch settings are done via cyclic fields, and so you can't parameterize them. That's easy to fix though. Follow this process:

    1. Copy the analogLib/sp2tswitch cell to your own library
    2. Do Tools->CDF->Edit (in the CIW), set the CDF Type to "Base" and then Browse to the copy of sp2tswitch you just made
    3. In the Component Parameters section, hit the Edit button
    4. For each of the parameters position, dcPosition, acPosition, tranPosition, icPosition set the following:
      1. paramType set to "string"
      2. Hit apply on the Edit CDF Parameter form before changing the Choose Parameter to the next parameter.
    5. OK the main Edit CDF form.

    Now you can place an instance of your copy of sp2tswitch in your design, and put a design variable in any of the fields you changed the CDF for. This means you'll be able to change the values using desVar() in your OCEAN script.

    Best Regards,

    Andrew.

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  • First of all, I'd like to check why you're using this component. The historical reason is usually because people are trying to analyze stability by closing the loop during DC and opening it during AC - but you'd be far better off using spectre's stb analysis which analyzes the loop gain of a loop whilst keeping the loop closed all the time. Perhaps you're doing something else, but this has tended to be the main reason why people used this component.

    However, the issue you're facing is because the switch settings are done via cyclic fields, and so you can't parameterize them. That's easy to fix though. Follow this process:

    1. Copy the analogLib/sp2tswitch cell to your own library
    2. Do Tools->CDF->Edit (in the CIW), set the CDF Type to "Base" and then Browse to the copy of sp2tswitch you just made
    3. In the Component Parameters section, hit the Edit button
    4. For each of the parameters position, dcPosition, acPosition, tranPosition, icPosition set the following:
      1. paramType set to "string"
      2. Hit apply on the Edit CDF Parameter form before changing the Choose Parameter to the next parameter.
    5. OK the main Edit CDF form.

    Now you can place an instance of your copy of sp2tswitch in your design, and put a design variable in any of the fields you changed the CDF for. This means you'll be able to change the values using desVar() in your OCEAN script.

    Best Regards,

    Andrew.

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