[Help] Calculate gm of a nMOS

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hien.rfic

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Hello everyone,

I want to calculate the transconductance gm of a MOSFET in ADS (Advanced Design System). I used equation gm = diff(I_drain,VGS) but it didn't work.

ADS displayed the error: While evaluating "gm": left operand: ee_boolparameter value required

Can anyone help me?
 

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