Chapter 5.4, Problem 4PP

Two kinds of current-to-voltage converters (also known as transresistance amplifiers) are shown in Fig. 5.15.

(a) Show that for the converter in Fig. 5.15(a),

$\frac{v_o}{i_s}=-R$

(b) Show that for the converter in Fig. 5.15(b),

$\frac{v_o}{i_s}=-R_1\left(1+\frac{R_3}{R_1}+\frac{R_3}{R_2}\right)$

Answer: Proof.

Figure 5.15

For Practice Prob. 5.4.