DEVICE WITH A DIFFERENTIAL AMPLIFIER CIRCUIT AND AN EXTRACTION CIRCUIT

摘要

An apparatus with two pairs of lines including a first and second channel further includes a phantom channel that is implemented to provide a third channel without physically installing lines. Based on a differential signal, a first common-mode signal level is generated at a first output of a differential amplifier circuit, and a second common-mode signal level on a second output, and the first common-mode signal level is applied to the lines of the first pair of lines and the second common-mode signal level to the lines of the second pair of lines. An extraction circuit is implemented to extract common-mode portions on the lines of the first pair of lines and the lines of the second pair of lines.