AC coupled fiber optic receiver with DC coupled characteristics

Details AC coupled fiber optic receiver with DC coupled characteristics AC coupled fiber optic receiver with DC coupled characteristics

1993-02-25

1994-12-13

Chilcot, Jr., Richard E.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

375 76, H04B 1006

Patent

active

053733886

ABSTRACT:
An AC-coupled receiver is provided which allows data with long periods of no signal sent on a fiber optic bus to be received without the normally required preamble. The receiver provides a voltage signal which is AC-coupled to one side of a differential amplifier with a delayed voltage signal AC-coupled to the other input of the differential amplifier. If the time constant of the AC coupling network is much longer than the signal baud time, low-frequency variations at the two inputs of the differential amplifier will be nearly identical and the low frequency signals will effectively cancel each other.

REFERENCES:
patent: 3757132 (1973-09-01), Nilsson
patent: 4375037 (1983-02-01), Ikushima
patent: 4431916 (1984-02-01), Couch
patent: 5175748 (1992-12-01), Takahashi

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