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The output resistance of the op-amp with feedback is

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in Linear Integrated Circuits by (39.8k points)
The output resistance of the op-amp with feedback is

(a) Same as that of the output resistance without feedback

(b) Greater than that of the output resistance without feedback

(c) Smaller than that of the output resistance without feedback

(d) None of the mentioned

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Asked question is from Voltage Series Feedback Amplifier in section Operational Amplifier Characteristics of Linear Integrated Circuits

1 Answer

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by (39.8k points)
Right option is (c) Smaller than that of the output resistance without feedback

In simpler terms: In voltage series feedback amplifier, the output resistance is (1/(1+AB)) times the output resistance of the op-amp. Therefore, the output resistance of the op-amp with feedback is much smaller than the output resistance without feedback.

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