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ADC & DAC

Discussion in 'General Electronics Discussion' started by rishinaidusrm, Jun 9, 2011.

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  1. rishinaidusrm

    rishinaidusrm

    3
    0
    Jun 9, 2011
    Hi guys I am new to this forum
    I am a beginner. Plz clear my problem

    If I convert an analogue signal to digital and again convert it back to analogue will i get exactly same signal.
     
  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    Not quite!
    If you use 8 bits you have 256 steps to fit your analogue signal to. When you convert back you will get the steps.
    There is also the problem of accuracy of the convertors and interference between the digital and analogue signals. An interesting experiment is to charge a capacitor and discharge it through a resistance. Digitising the voltage should show a stepped smooth curve but if there is interference between analogue and digital it can give large and small steps
     
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