confusing with DC offset

Discussion in 'General Electronics Chat' started by kaznov, Mar 10, 2012.

  1. kaznov

    Thread Starter Member

    Mar 10, 2012
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    0
    Hi guys I have read a lot about DC offset here but still I dnt have the solid idea or thought about it, I just know that it's a vertical component that I can control when I was doing circuit lab for one of the labs I have done but I dnt know what's the point of having and wht does it to to AC signal and wheere does it come from
    please I need someone to simplify it to me so i can really get it
    thanks guys
     
  2. #12

    Expert

    Nov 30, 2010
    16,247
    6,744
    You need to get more specific. What circuit? What device?

    Just a poke in the dark, but DC offset in an op-amp is considered an error. Other times, you want to actually build in an offset to change the zero point of the wave.
     
  3. kaznov

    Thread Starter Member

    Mar 10, 2012
    30
    0
    In general
    I dont know what really the benefit of it and when is it desirable to have such a thing and what really does it do to a sinusoidal signla please
    thanks
     
  4. #12

    Expert

    Nov 30, 2010
    16,247
    6,744
    The DC offset doesn't do anything to a sinewave except move it to a different place on the graph.

    If you had a set of signals that ranged from 1 volt to 5 volts and you wanted them to be in the range of 6 volts to 10 volts, you would intentionally cause an offset of 5 volts to make an op-amp output the range of voltages you want.
     
  5. kaznov

    Thread Starter Member

    Mar 10, 2012
    30
    0
    that heps alot
    thanks for the clarification sir
     
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