JPS57143945A - Receiving circuit for burst optical communication - Google Patents
Receiving circuit for burst optical communicationInfo
- Publication number
- JPS57143945A JPS57143945A JP56028314A JP2831481A JPS57143945A JP S57143945 A JPS57143945 A JP S57143945A JP 56028314 A JP56028314 A JP 56028314A JP 2831481 A JP2831481 A JP 2831481A JP S57143945 A JPS57143945 A JP S57143945A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- burst
- signal
- burst optical
- optical signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To eliminate variation in bit width during the reception of a burst optical signal, by eliminating the drift of a DC level by using two discriminating circuit differing in threshold voltage adequately for the front part and succeeding part of the burst optical signal respectively. CONSTITUTION:A burst optical signal 100 is processed by photoelectric conversion 200, whose output is inputted through an AC coupling preamplifier 300 to the 1st discriminating circuit 400 having the 1st threshold value and a control input terminal, and the 2nd discriminating circuit 500 having the 2nd threshold value and a control terminal. The output signals of those circuits 400 and 500 are led to an OR circuit 600, whose output is sent to a separating circuit 700 during the reception of a data signal. Once the head part of the burst signal is detected, the circuit 400 substitutes for the circuit 500, and once the tail part of the burst signal is detected, the circuit 500 substitutes for the circuit 400 in response to a signal supplied from the circuit 700 to their control input terminals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56028314A JPS57143945A (en) | 1981-03-02 | 1981-03-02 | Receiving circuit for burst optical communication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56028314A JPS57143945A (en) | 1981-03-02 | 1981-03-02 | Receiving circuit for burst optical communication |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57143945A true JPS57143945A (en) | 1982-09-06 |
Family
ID=12245148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56028314A Pending JPS57143945A (en) | 1981-03-02 | 1981-03-02 | Receiving circuit for burst optical communication |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57143945A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57147115A (en) * | 1981-03-05 | 1982-09-10 | Matsushita Electric Ind Co Ltd | Information carrier |
-
1981
- 1981-03-02 JP JP56028314A patent/JPS57143945A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57147115A (en) * | 1981-03-05 | 1982-09-10 | Matsushita Electric Ind Co Ltd | Information carrier |
JPH031730B2 (en) * | 1981-03-05 | 1991-01-11 | Matsushita Electric Ind Co Ltd |
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