Circuit arrangement for serial data transmission between a plura

Details Circuit arrangement for serial data transmission between a plura Circuit arrangement for serial data transmission between a plura

1987-02-13

1988-11-15

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 8, 375 17, 455607, H04B 140, H04B 900

Patent

active

047854650

ABSTRACT:
A circuit arrangement is provided for serial data transmission between a plurality of subscriber stations via a loaded data bus and having transmitters that are in a high-impedance state in the passive condition and in a low-impedance state in the active condition. In such a circuit arrangement, a mutual control of the subscriber stations occurs via the data bus per se without the assistance of additional control lines. This is achieved with the assistance of a recognition circuit which emits a free signal at its output given at least approximately identical voltages at the data bus and emits a busy signal given different voltages at the data bus. The control arrangement is particularly suitable for utilization in remote control stations.

REFERENCES:
patent: 4649548 (1987-03-01), Crane
Selected Interface Circuits Data Book for Design Engineers, Texas Instruments, 1982, pp. 388-389.
Bruins, T., "Data Transmission is Faster with Ternary Coding", Electronics, May 30, 1984, pp. 119-120.
Pippenger, D., "Line Drivers . . . Computer Systems", Electrical Design News, Mar. 15, 1972, pp. 44-46.
Burgess, R., "RS422 and Beyond", Electronic Engineering, Oct. 1981, pp. 81-85.
Baker, S., "Interface Standard RS-485 . . . anwerdbar", Elektronik, 1984, p. 24.

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