Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
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.
Nagahori Takeshi
Nyu Takayuki
Yamazaki Shuntaro
Chan Jason
NEC Corporation
Sedighian Mohammad
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