Abstract: A device including a comparator (3) each input of which receives signals from an information transmission line (1, 2) through a capacitor (4, 5), is characterized in that devices for forced switching (6) are interposed between the information transmission lines (1, 2) and the inputs of the comparator (3), the output of the latter being connected to one input of an OR gate (7) whose other input receives a reinitialization signal from a protocol decoder and whose output is connected directly and through an inverter to the device for forced switching (6) in order to reinitialize the comparator when the latter is blocked in a dominant state following interference.

Abstract: Device in which some elements perform functions having high priority access characteristics and other elements perform functions having low priority access characteristics, wherein the central information processing unit comprises a microprocessor assembly connected to first protocol control means connected through multiplexing means to first information input/output means connected to low priority access buses to which are connected the elements having low priority access characteristics, and the microprocessor assembly is connected to second protocol control means connected to second information input/output means connected to a high priority access bus to which are connected the elements having high priority access characteristics.

Abstract: This interface includes three comparators, the inputs of the first comparator being connected to the two transmission lines, one of the inputs of the second comparator being connected to one of the transmission lines and the other input of this comparator being connected to a bias voltage generator, one of the inputs of the third comparator being connected to the other transmission line and the other input of this comparator being connected to the bias voltage generator. The outputs of the comparators are connected to inputs of a multiplexer whose output is connected to the remainder of the circuits of the station, and the control inputs of the multiplexer are connected to the output of defect detecting means for detecting defects of one of the transmission lines so that the transmission lines control the multiplexer in such manner that the multiplexer selects the output of one of the comparators as a function of the state of the transmission lines.

Abstract: This device for the differential transmission of items of information between at least two elements (1, 2) of an automobile vehicle, each of which elements comprises transmitting means (13, 16) and information receiving means (14, 17) interconnected by two information transmitting lines (11, 12), further comprises means (14a, 17a, 14b, 17b) for processing signals circulating in the information transmitting lines whereby to permit an operation of the device in a degraded mode from signals circulating in one of the information transmitting lines (11, 12).