Fault tolerant output stage for digital two-conductor bus data c

Details Fault tolerant output stage for digital two-conductor bus data c Fault tolerant output stage for digital two-conductor bus data c

1996-02-05

1998-06-09

Beausoliel, Jr., Robert W.

39518509, 395308, 395311, G06F 1114, G06F 1116, G06F 1104

Patent

active

057650314

ABSTRACT:
The invention provides a fault tolerant output stage for a digital two-conductor bus data communication system of the type having a transmission module and a reception stage which contains a bus signal intermediate processing module and a reception module connected downstream that conditions incoming bus signals for a data processing unit which is connected downstream. A state detection module is connected to the bus lines to detect a short-circuit between the bus lines, in which case the transmission module can be switched over between a difference mode of operation and a single-wire mode of operation under the control of the state detection module. The intermediate processing module is configured to condition the bus signals for the reception module automatically or under the control of the state detection module, both in the case of fault free bus lines and in the case of an interruption or short-circuit to the high or low supply voltage of one of the two bus lines and in the case of a short-circuit of the two bus lines to one another.

REFERENCES:
patent: 4764759 (1988-08-01), Braun et al.
patent: 5243623 (1993-09-01), Murdock
patent: 5357518 (1994-10-01), Peter
"CAN--das sichere Buskonzept," Jens-Ulf Pehrs et al., Elektronik 17/1991.
Patent Abstract of Japan, vol. No. 213 (E-1356), Publication No. JP4-351034, dated 26 Apr. 1993.
"CAN--das sichere Buskonzept," Jens-Ulf Pehrs et al., 2087 Electronik 17/1991, Bd. 40, Nr. 20, Aug. 1991, pp. 96-101.
European Search Report dated Jun. 7, 1996.

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