jasmin_123 said:You cannot use Miller's theorem because the circuit gain is frequency dependent.
jasmin_123 said:Hi, maninnet,
Baker considers a general AC case, without distinguishing between LF and HF, and, hence, all his capacitors, including Cload, are short circuited. Also the signs "equal exactly" in the equations suggest the same. What confuses is the "Big" value of a capacitor. One can think that all the other capacitors are not big enough to have a zero impedance.
the problem with method 2 is you cannot assume N to be AC ground since if you assume it to be AC ground then you are assuming that there is no signal at that point but in fact you are trying to calculate the pole for the signal that you input to N! If truly N is AC ground then method 1 is wrong since then you won't have miller effect on C1.