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Op amp as INVERTING AMPLIFIER A "feedback" resistor is used to reduce the gain of the op amp.
In general, the definition of the gain (A) of an amplifier is
In the particular case of an op amp with negative feedback (as in this circuit) it can be shown that the gain can be calculated using
Using Rin = 10k and Rf = 33k, take at least two readings of Vin and Vo in order to verify this relation.
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