I'm trying to design this circuit using gm/Id method.
I am already able to achieve the desired GBWP and Gain (this is just a simple example so I'm just trying to achieve both) but I'm having trouble deciding on which length values I should use. I know that increasing the length increases the output resistance and in turn, the intrinsic gain. However, I'm not sure which other parameters I should consider when increasing the length. How should I choose which length I should use for NMOS? I also noticed that one can also use lengths where both the NMOS and PMOS have the same output resistance. When should I do this (making resistances equal)? And when should I not? What would happen if an NMOS's or PMOS's resistance is larger than the other?