simple question-error: an undefined model of f_subtractor

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lhlbluesky

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simple question

i want to use subtractor in functional lib for simulation,but an error appears:an undefined model of f_subtractor,what's the reason and how to solve it?

besides, for xfmr in analoglib,what's the value of its gain? is that the ratio of turns of primary and secondary?

pls give me an explanation,thanks.
 

simple question

Your question is too simple, incomplete. What are you writing about? Any Spice? What is the object of your simulations?

Probably you have to define a proper model and its parameters...
 

simple question

i use in spectre for some ideal simualtion , can you explain more?
 

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