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effect of commom mode feedback on CMRR of a telescopic opamp

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pankaj jha

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hello everyone !!!
what is the effect of commom mode feedback on CMRR of a telescopic opamp?? is there any paper/book discussing the same???
 

Generally, commom mode feedback (CMFB) improves the CMRR of (any) opAmp by keeping the CM output well within the CM output range for a wide range of CM input.
 

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