DIFFERENTIAL RECEIVER WITH COMMON-GATE INPUT STAGE

摘要

A low-voltage differential communication system includes a low- and programmable-swing voltage-mode transmitter that delivers a low- voltage differential signal to a receiver via differential channel. The receiver employs two input transistors, each in a common-gate configuration, to recover the low- voltage differential signal. A current source in the receiver biases the input transistors such that their source voltages are nominally biased at the common- mode voltage of the differential signal, and their gate-source voltages remain essentially constant with common-mode-voltage fluctuations.