Assume the instrumentation amplifier in Figure 9.26 has ideal op-amps. The circuit parameters are R1 = 10 kΩ, R2 = 40kΩ, R3 = 40kΩ, and R4 =120kΩ. Determine υO1, υO2, υO and the current in R1 for (a) υI2 = 1.2 + 0.08 sin ωt (V), υI1 = 1.2 ‒ 0.08 sin ωt (V); and (b) υI2 = − 0.60 ‒0.05 sin ωt (V), υI2 = − 0.65 + 0.05 sin ωt (V).
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