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What is noise contribution of the additional input stage

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chen_Analog

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What is the noise contribution of the additional input stage formed by the MF1 and MF2 which functions as multipath zero compensation.
 

Hi.
I think the noise contribution of this stage is the same as the main path.
For example if you want to calculate the input-referred noise, the input referred noise of MF1 and MF2 directly goes to input and this value adds up with the input-referred noise contribution due to the main path, i.e. MI1, MI2 and Mo.

Regards,
EZT
 

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