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cm voltage at integrator input SDM

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arunkumar446

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in a fully differential sigma delta modulator, what should be the common mode voltage at input signal and how do we decide. Thanks in advance.
 

normally,the common mode voltage is the center voltage of teh ADC
 

The normal the VCM is =VDD/2, The VDD is SDM volatge.
 

arunkumar446 said:
in a fully differential sigma delta modulator, what should be the common mode voltage at input signal and how do we decide. Thanks in advance.
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You can define common voltage by your self. It should be same as common voltage of your integrator.
 

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