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Till what frequency do we get amplification from IC 741?

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Till what frequency do we get amplification from IC 741?

(a) Unity gain bandwidth

(b) 3-dB frequency

(c) Infinity

(d) UGB + fOL

The question was posed to me in an online quiz.

The doubt is from Operational Amplifiers in portion Op-amps and its Applications of Analog Circuits

1 Answer

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Correct answer is (a) Unity gain bandwidth

Easiest explanation: The 3dB frequency is the cut-off frequency, where the gain is \(\frac{1}{\sqrt{2}}\) of the maximum. The gain is only constant for infinite frequency, that is, has infinite bandwidth if the op-amp is ideal, which practically doesn’t exist. The UGB is the point at which the gain of op-amp reaches 1.

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