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  1. #1
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    Design a fourth-order sigma-delta modulator

    Dear all,

    When I design a fourth-order sigma-delta modulator, what kind of issues should I need to take care?

    And, can someone tell me the design-flow of high-order sigma-delta modulator?

    Thanks so much!!!!


    This circuit which I'll design as shown.

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  2. #2
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    Re: Design a fourth-order sigma-delta modulator

    hehe
    opamp dc gain should be larger especially for first stage
    and match between error cancel digital filter and analog integrators



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  3. #3
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    Re: Design a fourth-order sigma-delta modulator

    Quote Originally Posted by wued
    hehe
    opamp dc gain should be larger especially for first stage
    and match between error cancel digital filter and analog integrators
    How to do the part of error cancellation logic?

    Thx for your replying!!!!



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  4. #4
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    Re: Design a fourth-order sigma-delta modulator

    you should do more behavorial level of work



  5. #5
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    Re: Design a fourth-order sigma-delta modulator

    what behavorial level?



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