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    about offset cancelling in comparator

    how to implement offset cancellling in comparator or AMP?
    Anybody have some good circuits?
    thanks!

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    Re: about offset cancelling in comparator

    8) you can trim the offset using a potentiometer from the ofset pin.
    which op amp are u using



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    Re: about offset cancelling in comparator

    Hi,

    See this app note from maxim : h**p://www.maxim-ic.com/appnotes.cfm/appnote_number/803


    * = t



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    Re: about offset cancelling in comparator

    You can use chopped method to cancel the offset



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    about offset cancelling in comparator

    you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.



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    Re: about offset cancelling in comparator

    hi sunking,
    how to use chopped method ? Please tell me.
    thank you

    Quote Originally Posted by sunking
    You can use chopped method to cancel the offset



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    Re: about offset cancelling in comparator

    hi piao,
    could you offer me the file?
    thank you

    Quote Originally Posted by piao
    you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.



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    Re: about offset cancelling in comparator




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    Re: about offset cancelling in comparator

    Quote Originally Posted by piao
    you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.

    can I find this book on this site ? thanks :)



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    Re: about offset cancelling in comparator

    You can design a circuit to increase or decrease output current at the output stage of comparator step by step till the offset is cancelled. Then the circuit burned some trimming cell bits to record the result.



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    Re: about offset cancelling in comparator

    hi, I have know a good network that "h**p://www.edacafe.com"

    then you can seach for chopper,

    a PHD thesis will give you a lot of knowledge about it.

    Or IEEE will help you.

    I am also interested with chopper. ^$^



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    Re: about offset cancelling in comparator

    you can downlaod this book by Razavi on EBOOK section in this EDAboard.



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    Re: about offset cancelling in comparator

    to use a chopper amp or view the page 464 of CMOS Analog Circuit Design by P.E.Allen and Holberg.



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    about offset cancelling in comparator

    chopping or SC are very wide used methods in offset cancellation ,and both of the two metods are dynamic .Is there any other method in offset cancellation? Now i am trying an offset cancellation method without capacitor. I tried several methods but they were very unstable.



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    about offset cancelling in comparator

    can you put a picture on this site?



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    about offset cancelling in comparator

    Autozeroing techniques about comparator
    CDS,CHS about Opamp



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