1) vs = 1 mV. Find v1, v2, v3 and vL
2) Model the three-stage cascaded amplifier by a single voltage amplifier model. What are the values of Ri , Avo, and Ro?
The Attempt at a Solution
1) v1 = 0.909 mV
v2 = 9 mV
v3 = 818 mV
vl = 744 mV
These are correct, same as the book
2) I got 900.42 to be the gain. But why is Ri and Ro the same values of the input and output of the 3 stage amplifier ?, I am thinking because Ri depends on the source voltage which is the same and Ro depends on the voltage given to the load which is also the same in both cases ?
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