Circuit for detecting transmission bus's abnormality and for con

Details Circuit for detecting transmission bus's abnormality and for con Circuit for detecting transmission bus's abnormality and for con

1993-10-29

1996-01-16

Lee, Thomas C.

Excavating

371 201, 326 21, 3642385, 36424294, 364265, 3642651, 364266, 364DIG1, 364DIG2, 364919, 36492796, 36493542, H03K 1900, H03K 19003, H03K 190175

Patent

active

054855802

ABSTRACT:
There is disclosed a two-wire input/output device with an object of avoiding that communication becomes impossible when an abnormality occurs on one of two-wire LAN transmission lines. A pair of buses are separately controlled by driver circuits. An abnormality on a transmission line is detected by an abnormality detecting circuit with data supplied to terminals, and driving of only one of the driver circuits which corresponds to the bus having the abnormality is stopped by an output control circuit. When an abnormality occurs on one of the transmission lines, communication is enabled with a driver circuit corresponding to the transmission line having the abnormality being protected.

REFERENCES:
patent: 4833600 (1989-05-01), Brodsky
patent: 5043938 (1991-08-01), Ebersole
patent: 5075569 (1991-12-01), Branson
patent: 5126601 (1992-06-01), Murphy
patent: 5264744 (1993-11-01), Mizukami et al.
Nagao et al. "Bus Driver IC for Use in Vehicle Multiplexing Communications", ASIC Confer. & Exhibit, 1992, pp. 79-82.
Furukawa Review, No. 88, Jun. 1991, Furukawa Electric Technologies Inc., "High Reliability Physical Layer for In-Vehicle High Speed Local Area Network", Tanaka et al., pp. 43-50.

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