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differential amplifier with source follower

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kickbeer

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differential source follower

hello,

look at my attachment. the output x01_in+ is shifted 180° from the input a. How to make sure so that this shifting is as low as possible? thx
 

differential amplifier

it's shifted since it inverted output. To minimize it use the one denoted as in- then it would be noninverted.
Infact the a is what i would call in- and b would be then in+
 

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    kickbeer

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differential follower

hi teddy, what is actually the function of source follower?
 

source follower tup

pretty much to lower signal from the level it was for another Vt.
Output from the diffamp is VDD-R*i so after SF you will have another 500mV or so down.
 

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