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transconductance frequency response problem

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Hello , I am trying to make a Vout/Iin frequency response for the current mirror shown bellow.In the DC region the current mirror workes great.

In order to make AC reponce for Iin/Vout i have added 1 to the AC source,on the output i have not changed the DC source and it stayed 0.5 V DC just to  set the bias point for the output transistor.

After that i have defined an expression using calculator IF(In_node)/Vf(out_node) as shown bellow.

However i get a zero plot threwout frequency range.

Where did i got wrong defining the sources or expression in order to get the frequency response of Vout/Iin?

Thanks




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