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

 

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.

 

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

 

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.

 

that heps alot
thanks for the clarification sir