http://en.wikipedia.org/wiki/Common-mode_signal http://en.wikipedia.org/wiki/Common-mode_signal http://en.wikipedia.org/wiki/Common-mode_signal http://en.wikipedia.org/wiki/Common-mode_signal http://en.wikipedia.org/wiki/Common-mode_signal http://en.wikipedia.org/wiki/Common-mode_signal common-mode voltages common-mode voltage http://en.wikipedia.org/wiki/Common-mode_signal Common mode (Longitudinal Balance)