# Reconsider Problem 5.1.9. If we define a power gain G P as the ratio of the power dissipated in…

Reconsider Problem 5.1.9. If we define a power gain GP as the ratio of the power dissipated in RL to the power produced by the source v1, find an expression for GP for the case when Ri1 = Ri2 = Ri, and Ro1 = Ro2 = Ro.

Problem 5.1.9

(a) Two amplifiers, which can be represented by the model of Figure 5.1.1 of the text, are connected in cascade (that is, head to tail), as shown in Figure P5.1.9. Let their parameters be Ri1, Ro1, A1, and Ri2, Ro2, A2, respectively. Find vx /v1.
(b) Discuss how the answer is influenced by the ratio Ri2/Ro1, particularly when this ratio approaches zero or infinity.

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