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Need help on switched CMFB

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prince_123

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I am making a residue amplifier for pipelined ADC on 65 nm node

Can any one tell me detailed working of switched CMFB
What will happen if there is an offset in the bias voltage set by the replica and actual bias voltage required?
Is there any way to ensure zero offset across all process cornets and temperatures?
 

U can see in 1)Razavi and 2) Baker
 

Hi,
I don't tink it would be zero in all corners, but you can decrease it adequately. This paper includes a good research on CMFB:
"Analysis of Switched-Capacitor Common-Mode Feedback Circuit",
By: Ojas Choksi and L. Richard Carley,
TCAS II, 2003.
 

Thanks naalald

It will be really great if you can post that paper, I don't have IEEE access in my company.
Thanks once again
 

Hi,
The paper is attached. Hope it helps you!
 

    prince_123

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Its really useful
Thanks for help
 

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