Rail Splitter, from Abraham Lincoln to Virtual Ground

Abstract: Rail splitting is creating an artificial virtual ground as a reference voltage. It is used to set the signal to match the op amp's \"sweet spot.\" An op amp has the most linear- and distortion-free qualities at that sweet spot. Typically, the sweet spot occurs near the center between the single power rail and ground. In the case of a number of signals, the virtual ground can control channel DC errors when multiplexing or switching the signals.