Write the closed-loop transfer function- what is the


Consider the noninverting op-amp circuit in Figure P12.18. The input resistance of the op-amp is Ri = ∞ and the output resistance is Ro = 0, but the opamp has a finite gain A.

(a) Write the closed-loop transfer function in the form

(b) What is the expression for β?

(c) If A = 105 and Av f = 20, what is the required β and R2/R1?

(d) If A decreases by 10 percent, what is the percent change in Av f ?

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Electrical Engineering: Write the closed-loop transfer function- what is the
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