Computer network having a single electrically continuous bi-dire

Details Computer network having a single electrically continuous bi-dire Computer network having a single electrically continuous bi-dire

1981-08-06

1984-03-06

Heckler, Thomas M.

Boots, shoes, and leggings

323902, G06F 300

Patent

active

044357648

ABSTRACT:
A computer network is disclosed in which a plurality of computer work stations are interconnected for interstation communications by a single electrically continuous bi-directional bus. Each computer work station includes a data processing device and a transceiver. The transceiver includes a receiver section for receiving signals transmitted over the bus and a transmitter section for transmitting signals onto the bus. The receiver section is coupled to the input of the data processing device by a first optical isolator and the transmitter section is coupled to the output of the data processing device by a second optical isolator. The data processing device and the first optical isolator are powered by a first power supply which is connected and grounded to the AC mains while the transceiver and second optical isolator are powered by a second power supply which is connected to the neutral conductor on the bus and is floating. The coupling and powering arrangement provides complete electrical isolation between the bus and the data processing device and noise-free transmission over the bus.

REFERENCES:
patent: 4048672 (1977-09-01), Seiden et al.
patent: 4251858 (1981-02-01), Cambigue et al.
Glaab, J., "Optical Couplers Isolate, Control and Monitor to Allow 6-KV Supply to Float," Electronic Design 4, Feb. 15, 1977, pp. 134-136.

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