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  1. #1
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    Noise in Sigma delta ADC

    I have designed a sigma-delta ADC. I tested the sample and found the snr of the ADC is only 70dB. I could not find where is wrong, who can help me?
    Thank you!

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  2. #2
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    Re: Noise in Sigma delta ADC

    there could be several problems:
    1. clocks are overlapping
    2. the switches W/L is low (rds is high)
    3. opamps alr slow

    check them separately!!!

    BEST!



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  3. #3
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    Re: Noise in Sigma delta ADC

    I feel that ur integrator is getting saturated..
    can u provide some more detail of ur design so that we can help u..
    Regards



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  4. #4
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    Re: Noise in Sigma delta ADC

    Pls tell us more detail,such as your DSM structure !



  5. #5
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    Noise in Sigma delta ADC

    analog DSM structure is more simple than others, i think your structure is all right. but some details in your design perhans is not good considered.



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