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A Question about incremental ADC (Read 1879 times)
watt.xu
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A Question about incremental ADC
Sep 09th, 2016, 1:31pm
 
Hello everyone:
I found there is not a lot concrete materials on reset timing on the Incremental ADC. Right now I am doing a MASH 2+2 structure incremental ADC. assume there will be a ideal digital error cancellation logic (digital differentiator ) on 2nd stage path as (1-z^-1)^2. May I ask how large the delay is introduced in this differentiator? Intuitively I thought it is two regardless reset cycles? Please let me know your ideas.
since in incremental adc application, we will reset every OSR cycles, these block introduce large delay is not good.  
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deba
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Re: A Question about incremental ADC
Reply #1 - Oct 15th, 2016, 12:09am
 
Could you post your block diagram?

The delay should be such that the quantization noise is cancelled from the first stage.
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