so this a homework problem that I am working on and I'm not looking for a flat out answer, just a good place to start and some help on the concept. So the question is as follows:
Suppose our objective is not to increase the total cascoded gain, but rather keep it at the single common-source stage's gain of gmRL, and extend the frequency response. Develop the theory needed to modify the Bode plot to show the new cutoff and unity gain frequency.
So what I understand so far is that the corner frequency is dependent on both internal and external capacitances of the circuit and transistors. I know that I have to account for the miller multiplier so the internal gate-drain capacitance appears larger, making my corner frequency smaller? and I also know that the corner frequency is w=1/τi where τi is the sum of the time constants, and the time constant is the resistance multiplied by the internal and external capacitances. Would adding more capacitors at the output or input to lower the total capacitance? I think that both of those solutions actually increase the time constant so it's not the direction I should go in. what about placing a small resistance between the input and output of the individual transistors?
Thanks for the help!