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How to measure the SNR of an ADC with CDS?

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chaojixin

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Hi, dear all:
I'm designing an ADC. I'm considering using correlated double sampling(CDS) technique. but if I use CDS as S/H, how can I measure the noise?
(I input a sin wave to the ADC and did FFTin my previous design of common ADC, but now this method is not appropriate)
thanks!
 

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