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How to plot device parameters from transient sims.

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Hello,

 

  I would like to plot gm, gds, cgs, cgd, etc. as a function of time in my spectre transient sims using analog artist.  How do I do this?

 

Thanks, Eric.

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  • archive

     Hi haiko,

     

      Thank you for your response.  Unfortunately it does not answer my question.  Let me try to be more specific:

    I already know how to open results, view and plot voltages and  currents in ocean and analog artist.

    I want to plot the small signal parameters of the BSIM4 model of some transistors during a transient sim.  Particularly, I want to track how the gm, cgd, and cgs change as a function of time.  These are transistor parameters, not voltages and currents.

    How do I:

    1) save these in simulation

    and 

    2) plot them as a function of time.

    And just to be completely clear, I am NOT interested in the operating point of these devices at a single time step like you can access using the menu: Results -> Print -> Transient Operating Points  OR the calculator expression: OPT("/dut2/MNP" "gm") which only give me these parameters at a SINGLE point in time, not as a waveform in time.

    This is a trivial thing to do in HSPICE, so I assume it must be a trivial thing to do in Spectre and Analog Artist.  I just can't find it.

     

    Thank you,

    Eric.

     

Reply
  • archive

     Hi haiko,

     

      Thank you for your response.  Unfortunately it does not answer my question.  Let me try to be more specific:

    I already know how to open results, view and plot voltages and  currents in ocean and analog artist.

    I want to plot the small signal parameters of the BSIM4 model of some transistors during a transient sim.  Particularly, I want to track how the gm, cgd, and cgs change as a function of time.  These are transistor parameters, not voltages and currents.

    How do I:

    1) save these in simulation

    and 

    2) plot them as a function of time.

    And just to be completely clear, I am NOT interested in the operating point of these devices at a single time step like you can access using the menu: Results -> Print -> Transient Operating Points  OR the calculator expression: OPT("/dut2/MNP" "gm") which only give me these parameters at a SINGLE point in time, not as a waveform in time.

    This is a trivial thing to do in HSPICE, so I assume it must be a trivial thing to do in Spectre and Analog Artist.  I just can't find it.

     

    Thank you,

    Eric.

     

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