The noninverting buffer op-amp configuration shown in Fig. P11.3 provides a direct implementation of the feedback loop of Fig. 11.1. Assuming that the op amp has infinite input resistance and zero output resistance, what is β? If A = 1000, what is the closed-loop voltage gain? What is the amount of feedback (in dB)? For Vs = 1 V, find Vo and Vi. If A decreases by 10%, what is the corresponding percentage decrease in Af ?
