In order to amplify an AC signal, it's required to provide a DC offset in order to block negative values of current to go through the input. Input signals and output signals oscillate centred on the Q point. What would this look like for an AC signal that is not DC-offset?
Would the input signal be stretched vertically and then clipped?

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/UpXsY.png