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help for 14bit pipeline adc digital correction

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windfire

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adc pipeline +post correction

hello everyone:
i am designning a 14bit pipeline adc, I used simulink to maike pipeline model,
first stage is a 4bit MDAC(gain*8),output 5bit data; then eight stages (1.5bit)(output 16bit data);the last stage is a 3bit flash adc.
the middle 8 stages 1.5bit MDAC and the 3bit flash adc, i used the digital correction way, it was correction.
but i am confused how to deal with the relationship between the first stage (5bit data) and the second stage's MSB.
anyone can help me~
thx

Added after 2 minutes:

sorry, 4bit MDAC gain is 8, output 5 bit data
 

I am not sure I understand your question... Are you asking how to add them to the next stage output?
I am also confuse on your topology: 4-bit for the first stage, 1.5-bit for the next 8 stages and 3-bit flash?

If this is the case, you need to properly align the output of each stage and then sum them using the correct bit weight.
 

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    windfire

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