In Example 327 we designed the interface circuit in Figure 365 to meet the requirements 2 = 2 V and RIN = 300 . It

In Example 3–27 we designed the interface circuit in Figure 3–65 to meet the requirements

υ2 = 2 V and RIN = 300 Ω. It is claimed that the interface circuit in Figure 3–66 meets the same requirements.

(a) Verify that the circuit in Figure 3–66 produces υ2 = 2 V and RIN = 300 Ω.

(b) It is desired that the 50-Ω load “see” a low output resistance. Which of these two circuits best meets this requirement?

40 V (+ 300 ww FIGURE 3-66 RIN Interface circuit 450 750 V2 www : 50