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Common mode feedback circuit

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B Swapna

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hi everyone
could u please tell me the design criteria in CMFB circuit for folded cascode, how to choose the circuit topology. is the current flowing in it is same as that of tail current source.
regards
Swapna
 

Try to use Dynamic common mode feedback if clock is avaiable or else go for a continous CMFB .The criteria for the continuos one is that make sure there is enough loop gain & phase margin .
 

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