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Sample and hold circuit using 741 Op-amp

Discussion in 'Electronics Homework Help' started by Shyamal796, Mar 19, 2012.

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  1. Shyamal796

    Shyamal796

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    Mar 19, 2012
    How can i make sample and hold circuit using 741 Op-amp? I am trying to make this circuit for my college project but facing some problem.

    Help me in which process i complete the project?
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Can you tell us what problems you're facing?
     
  3. john monks

    john monks

    693
    1
    Mar 9, 2012
    You might consider looking at the Nacional Semconductor datasheets for lf11331 or lf356.
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    The 741 is probably not the best selection for an S&H circuit due its comparatively high input current. Consider using a (C)MOS OpAmp or a JFET OpAmp, as John Monks suggested.

    In any case you'll need an analog switch (CMOS), too, to decouple the signal from the S&H circuit during the hold phase.

    Harald
     
  5. Shyamal796

    Shyamal796

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    Mar 19, 2012
    Do you give me circuit diagram?
     
  6. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Please google "sample and hold schematic"

    Harald
     
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