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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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  • Ron M

    Hi Andrew,

    Let me elaborate:

    Next to a transistor, we have an additional model that includes a resistor. This resistor resistance is defined as a function of the transistor gm at DC.

    Currently the designer is running a single DC analysis in ADE, displays the gm and set the resistor accordingly. This resistor is used afterwards for all analyses.

    In our current methodology the designer uses the same resistor for all PVTS/modes (for example when running in ADEXL).

    This is not accurate enough for our next project. We would like to find a way to update this resistor before each PVT/mode.

    BR,

    Ronen

Reply
  • Ron M

    Hi Andrew,

    Let me elaborate:

    Next to a transistor, we have an additional model that includes a resistor. This resistor resistance is defined as a function of the transistor gm at DC.

    Currently the designer is running a single DC analysis in ADE, displays the gm and set the resistor accordingly. This resistor is used afterwards for all analyses.

    In our current methodology the designer uses the same resistor for all PVTS/modes (for example when running in ADEXL).

    This is not accurate enough for our next project. We would like to find a way to update this resistor before each PVT/mode.

    BR,

    Ronen

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