Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1985-02-05
1987-02-03
Orsino, Jr., Joseph A.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455607, 455612, H04B 900
Patent
active
046413731
ABSTRACT:
A T-connection fiber-optic repeater is used in a fiber-optic network wherein the repeaters are connected by optical fibers to other repeaters and the repeaters are also connected to stars, in such a manner that an optical signal can move from repeater to repeater without having to traverse a star. Each repeater includes optical receivers for receiving optical signals from the adjacent repeaters and from a nearby star and optical transmitters for emitting optical signals to the adjacent repeaters and the nearby star. Since signal reflections from the nearby star arrive almost immediately after signals from the adjacent repeaters, an inhibit circuit is used to gate signals from the nearby star when signals are being received from either of the adjacent repeaters. This avoids instability arising from repeated signal reflection without imposing a significant time delay as reflected signals propagate through long lengths of fiber. Modified embodiments permit a repeater to support more than one nearby star or to be used in a branching fiber-optic network.
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Abeles Daniel C.
Orsino Jr. Joseph A.
Westinghouse Electric Corp.
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