Optical data bus having a statistical access method

Details Optical data bus having a statistical access method Optical data bus having a statistical access method

1985-06-26

1987-05-05

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

455608, 360 44, H04L 2700

Patent

active

046637672

ABSTRACT:
An optical data bus with a statistical access method for the transmission of data between transmitters and receivers in the form of NRZ data provides that every transmitter of a subscriber contains a Manchester encoder which Manchester encodes the NRZ data and deposits such data onto the bus in a Manchester-encoded form. The receiver of every subscriber contains a Manchester decoder for the reacquisition of the NRZ data from the Manchester encoded data and contains a clock recovery device which recovers the clock contained in the Manchester-encoded data. Such a Manchester decoder with the clock recovery device can be constructed in a very simple manner and such a simple structure is disclosed. A very simply-constructed bus state recognition device is also included.

REFERENCES:
patent: 3980825 (1976-09-01), Morrien
patent: 4257125 (1981-03-01), Theall, Jr.
patent: 4276656 (1981-06-01), Petryk, Jr.
patent: 4491942 (1985-01-01), Witle et al.
patent: 4562582 (1985-12-01), Tokura et al.
Yount, "Manchester Detector Optimizes Fiber-Optic Receiver", Electronics, Jun. 16, 1982, p. 159.
Texas Instruments "Data Book", p. 209, p.76 (with respect to the modules SN 74 S86 & SN 74 SN 74).
Metcalfe et al., "Ethernet: Distributed Packet Switching for Local Computer Networks", Comm. of the ACM, Jul. 1976, vol. 19, No. 7, pp. 395-404.

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