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Well,I tried another classical CMFB using differential pair yesterday, It worked well.
but the switched-capacitor CMFB just didn't work.
What should I be attention to ? how much capacitor could be appropriate?
cmfb charge injection switched capacitor
I'm designing a sc circuit used for MDAC in a 40M/s pipeline ADC
I use a two stage amp ,telescope for the first and common source for the second
Should I use two cmfb loop ? one for the first stage ,and the other for the second?
which kind of cmfb...
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