Low energy data communication circuit for hazardous or...

Details Low energy data communication circuit for hazardous or... Low energy data communication circuit for hazardous or...

2009-03-09

2011-11-08

Le, Dinh T. (Department: 2816)

Telecommunications

Transmitter and receiver at separate stations

With control signal

C455S073000

Reexamination Certificate

active

08055208

ABSTRACT:
The present invention relates to a data communication circuit and system for use in hazardous or nonhazardous environments. In the preferred embodiment, the system is a bi-directional, low energy, current loop data communication circuit primarily for high speed data communications via parallel or twisted pair conductors. The system of the present invention can safely transmit data across long distances (e.g., up to 1000 feet (300 meters)) in an explosive atmosphere.

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patent: 5587709 (1996-12-01), Jeong
patent: 5675584 (1997-10-01), Jeong
patent: 6194934 (2001-02-01), Detering
patent: 6417790 (2002-07-01), Fiedler et al.
patent: 7915873 (2011-03-01), Yen
patent: 2003/0169836 (2003-09-01), Ebuchi et al.
patent: 2004/0100854 (2004-05-01), Rahamim et al.

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