Optical transmitter/receiver and a network using such optical tr

Details Optical transmitter/receiver and a network using such optical tr Optical transmitter/receiver and a network using such optical tr

1997-07-16

2000-02-15

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359152, 359110, 359163, 359177, 385 53, H04B 1000, H04B 1008, H04B 1002

Patent

active

060259450

ABSTRACT:
An optical transmitter/receiver transmits and receives optical signals between terminal devices of a network which are connected by a twisted pair cable with a feeder line. The optical transmitter/receiver has an electric connector for connection to the twisted pair cable, a peak holding circuit for detecting whether there is an optical signal in an optical fiber based on an output signal from an optical receiver, and a biasing circuit for applying a bias voltage to the twisted pair cable. The biasing circuit applies a bias voltage to a twisted pair of the twisted pair cable if there is an optical signal in the optical fiber, and stops the application of the bias voltage to the twisted pair if there is no optical signal in the optical fiber. The terminal devices are capable of detecting insertion or removal of the twisted pair cable or the optical fiber.

REFERENCES:
patent: 4004156 (1977-01-01), Schuller
patent: 4654890 (1987-03-01), Hasegawa et al.
patent: 5615033 (1997-03-01), Yoshida et al.
patent: 5768279 (1998-06-01), Barn et al.
IEEE Standard for a High Performance Serial Bus, IEEE Std 1394-1995, Aug. 30, 1996, pp. 83, 85 and 98 pp. 83, 85 and 98.

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