Device for differential-mode information transmission between at

Details Device for differential-mode information transmission between at Device for differential-mode information transmission between at

1992-08-03

1994-09-13

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

371 82, 34082503, H04B 300

Patent

active

053475437

ABSTRACT:
This device in which the elements are linked by two information transmission lines (2, 3) and each of which includes information sending and reception circuits (4, 5), linked to a protocol handler (6), is characterized in that the reception circuit (5) of each element (1) comprise three comparators (7, 8, 9), a first comparator (7) receiving the signals transiting on the two lines (2, 3), a second comparator (8) receiving the signals transiting on a line (2) and a third comparator (9) receiving the signals transiting on the other line (3) and, interposed between the output of these comparators (7, 8, 9) and the information input (RC) of the handler (6), a circuit (10) for selective connection of the output (R0) of the first comparator (7) or of the output of a circuit for logically combining the outputs (R1, R2) of the second and third comparators (8, 9), to the input of the protocol handler (6), under the control of the latter as a function of the state of the signals present at its input, in order to permit operation of the device in normal differential mode and in degraded mode on the basis of information transiting on one of the lines.

REFERENCES:
patent: 4792950 (1988-12-01), Volk et al.
patent: 4929941 (1990-05-01), Lecocq et al.
patent: 5031176 (1991-07-01), Magne et al.
patent: 5073902 (1991-12-01), Lecocq et al.

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