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Using a DC operating point as parameter

Ron M

Hi,

Just wondered if there is an easy solution to this that does not involve using skill/ocean.

We are running a DC analysis and would like to use a transistor operating point (in our case 'gm') as a parameter to next AC/RF analyses.

In the past we designer just ran a DC in certain condition (PVT/mode) and set the value manually assuming it will be good enough for all other conditions.

Now, we are more sensitive to this parameter and would like to set it up separately for each condition.

Did someone do something like that? Do you an idea how to do it?

Thanks,

Ronen

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  • Andrew Beckett

    Hi Ronen,

    I'm not sure what your question means? If you run a dc operating point and the conditions are the same as for the subsequent AC analysis, then the gm would be the same. For an RF analysis, I'm not sure what this would mean - because the gm would probably be time-varying.

    You can't set the gm on a device anyway - so I really don't understand what you're trying to do here.

    Kind Regards,

    Andrew.

Reply
  • Andrew Beckett

    Hi Ronen,

    I'm not sure what your question means? If you run a dc operating point and the conditions are the same as for the subsequent AC analysis, then the gm would be the same. For an RF analysis, I'm not sure what this would mean - because the gm would probably be time-varying.

    You can't set the gm on a device anyway - so I really don't understand what you're trying to do here.

    Kind Regards,

    Andrew.

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