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modeling output impedance in a file

dzakharian

hello,

i am trying to model an LDO as a norton equivalent network.  i can run an .ac simulation to get the output impedance vs frequency and export it as a file, but am having a difficult time figuring out how to attach this file (with magnitude/phase information) to a current source and then use that norton equivalent network in my simulations.  i was hoping it would be something akin to including a noise file for a vdc source, but i haven't found a way to do so.  is this even possible?

many thanks in advance.

Parents

  • Providing an impedance versus frequency to a circuit simulator is not an entirely straightforward thing for it to deal with - because it's necessary to produce a causal time domain model from the frequency domain description.

    The normal way of doing this would be to perform an s-parameter analysis (sp) and then save the s-parameters from that and use them on an instance of an nport.

    Regards,

    Andrew.

Reply

  • Providing an impedance versus frequency to a circuit simulator is not an entirely straightforward thing for it to deal with - because it's necessary to produce a causal time domain model from the frequency domain description.

    The normal way of doing this would be to perform an s-parameter analysis (sp) and then save the s-parameters from that and use them on an instance of an nport.

    Regards,

    Andrew.

Children

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