At my work , they say DC component is the "TIME GAP" or " Cross over" section between the positive and negative cycles at the zero crossing point when you have a push pull network
Is this Time gap or Cross over called DC component?
If the DC component is not zero and is +5 volts. The Positive cycle will END at +5 volts not at zero volts? The Positive cycle should END at zero volts having zero DC component
The DC component of any signal is its average value. Classic sine waves have an average of 0 volts and therefore no zero component. Circuits which operate off a single ended supply usually do not generate a negative going signal and therefore will always have a DC component. For DC coupled amplifiers with a single supply that is usually 1/2 of the supply voltage.