Sceadwian
Full Member level 3
I have a 2volt peak to peak AC waveform coming from an audio source, a standard line-out signal. I'm feeding this signal into an ADC with a 1 megaohm resistance. The ADC only reads from 0 to 5 volts though. How do I DC bias the AC signal? 2.5 volts would be the obvious DC bias, but I don't know how to go about it, help please! =) Any simple theory behind DC biasing (including transitor biasing) would be appreciated as well.