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guide needed for simulating the circuit with script

rockyicer

hello, guys,

    I used to simulate the analog circuit by clicking the GUI provided by IC616 and mmsim14.  I find it's such a burden to simulate the same circuit for so many times. for example, if I design a specified OTA including only 9 mosfets and 2 capacitors. I have to adjust the dimensions for uncountable times to find  good ones, especial for a optimal one(e.g noise optimation).  

Now I want to do this in an automated way. I want to write the scripts in order to let the program calculating the proper bias voltage and mosfet and passive elements dimensions for me with the optimization method I give. Here is problem: where can I find the materials that could guide me to learn the scripts language(I know there is pspice)?  I hope this language could allow me to call the simulator(like mmsim14) to do the needed simulation such as DC AC STB PSS etc.... and return the simulated results to the specified directories. and then I could transfer these results to the python scripts that I write to find the optimal values. Or a better situation is I could use the functions(e.g: find the maximum point of a simulated line such as gm/ID line or find the point corresponding to maximum slope rate) provided by the IC616 Platform(I believe it's exist in the waveform tools, but how do I call these functions?) instead of using the python scripts.  For a single simulation, maybe the result is not the optimal one, so I need to call the simulator to do the former simulation again if the current values don't meet my targets values until I find the optimal one( the ones that meet my targets values). 

I have the systemic design methodology. Could anyone give me some links(including the RAK or documents) or the name of the pdfs in the IC616 doc files which could guide me to learn the appropriate language to describe the detailed circuits and call the ADE simulator and do the Loop to find the target values?

forget to mention: I use tsmc technology so I do have all the model files used by spectre.

 

thans in advance!

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  • Andrew Beckett

    Why do you need this? The linearised circuit is used inside the simulator for doing things like ac analysis - and the values output by the model in the operating point analysis are generally output for user understanding, not to allow you to plug them in to your own small-signal equivalent circuit. There may also be operating point parameters that are output that aren't directly used in such a small-signal model.

    Put another way, this is an implementation detail within the bsim4 model. You could consult the bsim4 web page on the University of Berkeley for more details.

    Andrew.

Reply
  • Andrew Beckett

    Why do you need this? The linearised circuit is used inside the simulator for doing things like ac analysis - and the values output by the model in the operating point analysis are generally output for user understanding, not to allow you to plug them in to your own small-signal equivalent circuit. There may also be operating point parameters that are output that aren't directly used in such a small-signal model.

    Put another way, this is an implementation detail within the bsim4 model. You could consult the bsim4 web page on the University of Berkeley for more details.

    Andrew.

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