[go: up one dir, main page]

JPS54158943A - Light signal branching circuit for data bus - Google Patents

Light signal branching circuit for data bus

Info

Publication number
JPS54158943A
JPS54158943A JP6796578A JP6796578A JPS54158943A JP S54158943 A JPS54158943 A JP S54158943A JP 6796578 A JP6796578 A JP 6796578A JP 6796578 A JP6796578 A JP 6796578A JP S54158943 A JPS54158943 A JP S54158943A
Authority
JP
Japan
Prior art keywords
light
data bus
light signal
branching
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6796578A
Other languages
Japanese (ja)
Inventor
Hidenori Nomura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6796578A priority Critical patent/JPS54158943A/en
Publication of JPS54158943A publication Critical patent/JPS54158943A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To maintain the light signal power in data bus nearly constant and achieve the versatility, standardization and higher reliability of circuits by resending out the signal of the light receiving part connected to cascade-connected directional photo coupling parts from the light transmitting part. CONSTITUTION:Directional coupling parts 10, 20 cascade-connected in the transmission direction of the light signals, the light receiving part 40 connected to branching terminal 11 and the light transmitting part 30 connected to branching terminal 21 are provided. A part of the electric signal outputted from the receiving part 40 to the terminal 60 is coupled to the transmitting part 30 via feedback circuit 50 and is sent out into the data bus through the coupling part 20. Hence, the transmitted light signal power is compensated of the decrease owing to branching and the attenuation by the transmission paths.
JP6796578A 1978-06-05 1978-06-05 Light signal branching circuit for data bus Pending JPS54158943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6796578A JPS54158943A (en) 1978-06-05 1978-06-05 Light signal branching circuit for data bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6796578A JPS54158943A (en) 1978-06-05 1978-06-05 Light signal branching circuit for data bus

Publications (1)

Publication Number Publication Date
JPS54158943A true JPS54158943A (en) 1979-12-15

Family

ID=13360184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6796578A Pending JPS54158943A (en) 1978-06-05 1978-06-05 Light signal branching circuit for data bus

Country Status (1)

Country Link
JP (1) JPS54158943A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072399A (en) * 1973-07-05 1978-02-07 Corning Glass Works Passive optical coupler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072399A (en) * 1973-07-05 1978-02-07 Corning Glass Works Passive optical coupler

Similar Documents

Publication Publication Date Title
JPS6472724A (en) Electronic endoscopic apparatus
JPS6432554A (en) Binary data communication system
EP0361368A3 (en) Light signal transmission system
JPS57197934A (en) Radio transmitter and receiver
JPS56103501A (en) Mic connecting structure
JPS54158943A (en) Light signal branching circuit for data bus
JPS6439845A (en) Data transmission equipment
SE8305382L (en) ELECTRONIC RELE switches
JPS6418326A (en) Space propagation optical communication equipment
JPS57176850A (en) Transmitting system
JPS5737942A (en) Optical signal relay system
JPS56138346A (en) Control system for multipoint line
JPS57173236A (en) Composite loop transmitter
JPS5613850A (en) Secondary signal piling transmission system
JPS54100206A (en) Radio digital signal receiving system
JPS56103555A (en) Transmission output control system
JPS57194611A (en) Branching and coupling circuit
JPS6436239A (en) Multiplex transmission equipment
DE3566762D1 (en) Antenna system for use in tunnels for broadband signal transmission
JPS5527749A (en) Optical fiber two-way transmission system
JPS5471904A (en) Optical communication unit
JPS54152901A (en) Light communication unit
JPS54113211A (en) Subscribersigma signal transmission system for caty
JPS55100759A (en) Fault-point orientation system
JPS5660127A (en) Optical fiber transmission system