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how cadence do to calculate Z11 in a psp analysis

Reda21

hi,   

i'm simuliting a circuit, where i connect 4 switching caps to the port, than i run a psp annalysis to get the input impedance"Z11", and i want to know how spectre do to give such result, it's for helping me understandind how the input impedance behave.

Parents

  • thank you andrew for your response.  

    actually, the results i got, show that the input impedance is a function of the source impedance (the impedance of the port), so there is to possible response:

    the psp is not the good analisys i have to run,

    or the input impedance do really change with the source resistance ( it's the first time i'm seeing someting like that)

    so my question was to know wich is the good response to my problem.

Reply

  • thank you andrew for your response.  

    actually, the results i got, show that the input impedance is a function of the source impedance (the impedance of the port), so there is to possible response:

    the psp is not the good analisys i have to run,

    or the input impedance do really change with the source resistance ( it's the first time i'm seeing someting like that)

    so my question was to know wich is the good response to my problem.

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