Optical transmitter/receiver and a network using such optical transmitter/receivers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 15, 2000
Grant Date -
N/A
app pub date -
Jul 16, 1997
filing date -
Jul 19, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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