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Digital sigma delta modulator

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knjayanth1

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how to design a delta sigma modulator for fractional frequency synthesis. which topology is better
 

which topology is better?

You should cal the SNR and Frequency then use the topology .usually MASH211 or MASH2-1 are used by many firms when they design OPLL ,FNplll
 

First search some paper and then design the modulator
 

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