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Which of the following is not preferred for input stage of Op-amp?

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in Linear Integrated Circuits by (37.1k points)
Which of the following is not preferred for input stage of Op-amp?

(a) Dual Input Balanced Output

(b) Differential  Input Single ended Output

(c) Cascaded DC amplifier

(d) Single Input Differential Output

This question was posed to me in an online quiz.

The origin of the question is Operational Amplifier Internal Circuit topic in section Operational Amplifier of Linear Integrated Circuits

1 Answer

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by (39.8k points)
Accurate option is (c) Cascaded DC amplifier

Let me elaborate: Cascaded DC amplifier suffers from major problem of drift of the operating point, due to temperature dependency of the transistor.

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