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Sigma Delta --> Single ended --> common mode (dc) spur

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svensl

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sigma-delta single ended

Consider a simple first order single ended sigma delta modulator (RC integrator).
Being single ended one terminal of the RC integrator and comparator sits at the common mode level. Being a dc signal it causes spurs in the o/p spectrum. Is there a way of resolving this without going to a differential circuit? Excluding dithering.
 

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