The input resistance ri fnbspis assumed to be small the

Question

Consider the current-to-voltage converter circuit shown in given Figure. The input resistance R_{i f} is assumed to be small, the output resistance is R_o = 0, and the op-amp gain A_z is large.

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

(b) What is the expression for β_g?

(c) If A_z = 5 × 10⁶ Ω and A_zf = 5 × 10⁴ Ω, what is the required β_g and R_F?

(d) If A_z decreases by 10 percent, what is the percent change in A_{z f}?