Consider the equivalent circuit of the op-amp shown in Figure 9.7(a). Assume terminal υ1 is grounded and the input to terminal υ2 is from a transducer that can be represented by a 0.8 mV voltage source in series with a 25 kΩ resistance. What is the minimum input resistance Rj such that the minimum differential input voltage is υid = 0.790 mV?
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