Two-port amplifier model practice problems
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Read the Amplifier class notes.

For the amplifier circuit shown, R_S = 3.9 kΩ, and R_L = 56 Ω.

For amp 1: R_i1 = 1.8 kΩ, A₁= 5, R_o1 = 180 Ω.

For amp 2: R_i2 = 220 Ω, A₂= 20, R_o2 = 680 Ω.

For amp 3: R_i3 = 220 Ω, A₃= 25, R_o3 = 82 Ω.

Find the gain, G = v_o/v_i.

Answer