JPS5662433A - Photoreceiver - Google Patents
PhotoreceiverInfo
- Publication number
- JPS5662433A JPS5662433A JP13959079A JP13959079A JPS5662433A JP S5662433 A JPS5662433 A JP S5662433A JP 13959079 A JP13959079 A JP 13959079A JP 13959079 A JP13959079 A JP 13959079A JP S5662433 A JPS5662433 A JP S5662433A
- Authority
- JP
- Japan
- Prior art keywords
- output
- circuit
- signal
- circuits
- adopts
- 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.)
- Granted
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
- H04B10/693—Arrangements for optimizing the preamplifier in the receiver
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
PURPOSE:To enable the reception of discontinuous optical signal different remarkably from optical power, by providing a plurality of amplifier circuit, detecting the amplifier circuit output having unsuitable amplitude and adopting this output. CONSTITUTION:Optical signals detected at a photodetector 21 are sequentially input to amplifiers 31-33. The output of each amplifier is fed to identifying circuits 41, 42, 43, which output 1 to the signal selection circuit when the output is more than a value, and 0 when less than a value. The output of the amplifiers 31, 32 is fed to detection circuits 51, 52 also, and the detection circuits output 1 to the signal selection circuit 61 when the amplitude of signal is more than specified threshold value, and 0 when less than it. The signal selection circuit 61 adopts the signal of the identification circuit 41 when the output of the detection circuit 51 is 1 for the output, it adopts the signal of the circuit 42 when the output of the detection circuit 51 is 0 and the output of the circuit 52 is 1, and the output of the circuits 51, 52 are both 0, it adopts the signal of the circuit 43.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13959079A JPS5662433A (en) | 1979-10-29 | 1979-10-29 | Photoreceiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13959079A JPS5662433A (en) | 1979-10-29 | 1979-10-29 | Photoreceiver |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5662433A true JPS5662433A (en) | 1981-05-28 |
JPS6351420B2 JPS6351420B2 (en) | 1988-10-13 |
Family
ID=15248803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13959079A Granted JPS5662433A (en) | 1979-10-29 | 1979-10-29 | Photoreceiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5662433A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039863A (en) * | 1973-07-06 | 1975-04-12 |
-
1979
- 1979-10-29 JP JP13959079A patent/JPS5662433A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039863A (en) * | 1973-07-06 | 1975-04-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS6351420B2 (en) | 1988-10-13 |
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