Analog Electronics — question 2 of 10
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You need to measure a small differential signal, only a few millivolts, riding on top of a 5V common-mode voltage from a Wheatstone bridge sensor. A colleague suggests building a simple difference amplifier from a single op-amp and four resistors. What is your concern with that approach, and what would you propose instead? Explain what property of the alternative circuit actually solves the problem.