D 2.45 Given an ideal op amp to implement designs for the following closed-loop gains, what values of resistors (R1, R2) should be used? Use at least one 10- kΩ resistor as the smallest resistor in your design.
(a) +5 V/V
(b) +10 V/V
(c) +21 V/V
(d) +100 V/V
(a) R1 = 10 kΩ, R2 = 40 kΩ; (b) R1 = 10 kΩ, R2 = 90 kΩ; (c) R1 = 10 kΩ, R2 = 200 kΩ; (d) R1 = 10 kΩ, R2 = 990 kΩ
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