In a particular application, it is necessary to implement the block diagram shown in Figure 4–54. The maximum individual OP AMP gain cannot exceed 2000. The input resistance of the first signal stage must be at least 10 kΩ. The nominal input signal υ1 is 1 μV.

Two vendors have provided competitive solutions, shown in Figure 4–55. Choose the best solution based on achieving the desired output considering: cost, parts count, variety of parts needed, and power usage

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2.6 Vo FIGURE 4-54 106 + Vo