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Hello, I have set the S21 parameter in the Amplifier2 block to (8.333,0) to achieve Vout(t) = 8.1 x Vin(t) with a linear gain output amplitude of 12.15V. This simulation result matches the theory. Now, I want to set Vout(t) = 8.1 x Vin(t) + 3.9 x (Vin(t))^2 - 3.1 x (Vin(t))^3 so that the output amplitudes of the second and third harmonics are 4.39V and -2.62V, respectively. How should I calculate and set the parameters? Do I need to add any additional components?

[ATTACH=full]198459[/ATTACH][ATTACH=full]198460[/ATTACH]

These are all parameters of Amplifier2 block.

[ATTACH=full]198463[/ATTACH][ATTACH=full]198464[/ATTACH]

More information (page 19): https://edadownload.software.keysight.com/eedl/ads/2011/pdf/ccsys.pdf

Thank you for your help.