JPS6477232A - Optical bus type communication system - Google Patents
Optical bus type communication systemInfo
- Publication number
- JPS6477232A JPS6477232A JP62214212A JP21421287A JPS6477232A JP S6477232 A JPS6477232 A JP S6477232A JP 62214212 A JP62214212 A JP 62214212A JP 21421287 A JP21421287 A JP 21421287A JP S6477232 A JPS6477232 A JP S6477232A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- bus
- level
- optical bus
- 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
Links
Landscapes
- Small-Scale Networks (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To always keep the optical signal level on an optical bus constant by always inputting DC light in a certain level from a light source onto the optical bus and modulating the DC light on the optical bus in accordance with transmission data by each terminal. CONSTITUTION:A light emitting source 10 is provided in one end of an optical fiber 20 constituting the optical bus, and the DC light in a certain level is always inputted from this light emitting source 10 to the optical fiber. Optical switches are provided on the optical fiber 20 correspondingly to respective terminals, and each terminal turns on and off the optical switch in accordance with transmission data to modulate the DC light on the optical bus at the time of transmitting data. Thus, the optical level in an optical receiver provided in the other end of the optical bus is fixed, and especially, it is unnecessary to adjust the optical level of the reception optical signal from each terminal to a certain value at a reception point.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62214212A JPS6477232A (en) | 1986-08-29 | 1987-08-28 | Optical bus type communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20343086 | 1986-08-29 | ||
JP62214212A JPS6477232A (en) | 1986-08-29 | 1987-08-28 | Optical bus type communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6477232A true JPS6477232A (en) | 1989-03-23 |
Family
ID=26513916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62214212A Pending JPS6477232A (en) | 1986-08-29 | 1987-08-28 | Optical bus type communication system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6477232A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06204950A (en) * | 1993-01-07 | 1994-07-22 | Nec Corp | Optical transmission system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5259502A (en) * | 1975-11-11 | 1977-05-17 | Nec Corp | Data transmission system using light fiber cable data highway |
JPS56132833A (en) * | 1980-03-21 | 1981-10-17 | Matsushita Electric Ind Co Ltd | Light transmission system |
JPS59214344A (en) * | 1983-05-20 | 1984-12-04 | Nec Corp | Optical data transmitter |
JPS60264139A (en) * | 1984-06-12 | 1985-12-27 | Nec Corp | Optical data transmission system |
-
1987
- 1987-08-28 JP JP62214212A patent/JPS6477232A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5259502A (en) * | 1975-11-11 | 1977-05-17 | Nec Corp | Data transmission system using light fiber cable data highway |
JPS56132833A (en) * | 1980-03-21 | 1981-10-17 | Matsushita Electric Ind Co Ltd | Light transmission system |
JPS59214344A (en) * | 1983-05-20 | 1984-12-04 | Nec Corp | Optical data transmitter |
JPS60264139A (en) * | 1984-06-12 | 1985-12-27 | Nec Corp | Optical data transmission system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06204950A (en) * | 1993-01-07 | 1994-07-22 | Nec Corp | Optical transmission system |
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