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What is the need for level shifter in operational amplifier?

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+1 vote
in Linear Integrated Circuits by (37.1k points)
What is the need for level shifter in operational amplifier?

(a) Level the quiescent voltage

(b) Remove distortion at output

(c) Limits the output voltage

(d) Increase the quiescent voltage

The question was posed to me by my school principal while I was bunking the class.

The query is from Operational Amplifier Internal Circuit in portion Operational Amplifier of Linear Integrated Circuits

1 Answer

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by (39.8k points)
The accurate answer is (c) Limits the output voltage

Grasp the essence with: Because of direct couple, Dc level rises stages to stage and tends to shift operating point. This limits output swing (Voltage).

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