help in , sample and hold

Discussion in 'Homework Help' started by dakanat, Apr 19, 2009.

  1. dakanat

    Thread Starter Member

    Nov 12, 2008
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    hi

    if anyone has known about , sample and hold please give it to me...
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. Papabravo

    Expert

    Feb 24, 2006
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    I know about them, but what are you expecting exactly?
     
  4. dakanat

    Thread Starter Member

    Nov 12, 2008
    25
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    I did the experiment of sample and hold after that I lost how to write the Conclusion
    so if you explain it.Plz​
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
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  6. dakanat

    Thread Starter Member

    Nov 12, 2008
    25
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    sorry i am not understand could you
    Summary it ​
     
  7. dakanat

    Thread Starter Member

    Nov 12, 2008
    25
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    and the experiment was about analogue to digital converter.
     
  8. beenthere

    Retired Moderator

    Apr 20, 2004
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    Possibly, you might find pages 4, 5, & 6 of the PDF on the AD585 interesting, as they bear directly on you query.

    Follow the link, get the PDF, read the PDF. You will learn everything you need to know.
     
  9. dakanat

    Thread Starter Member

    Nov 12, 2008
    25
    0
    i ve read the PDF was more specifically, so jest i need general about it
     
  10. Papabravo

    Expert

    Feb 24, 2006
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    You have a capacitor and a switch.
    When you close the switch the capacitor "samples" the input voltage.
    When you open the switch, the charge has no place to go and so the capacitor "holds" this voltage.
    Then the A/D converter may read this voltage at its own pace.

    The key features are how well does the capacitor follow the input, it is a low pass filter after all, and how fast does the voltage leak off after the switch is opened.

    Don't understand how you could do the experiment and lose the conclusion. I have confidence that according to the inscription on the silver chest:

    "Who chooseth me shall get as much as he deserves,"
     
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