JPS5662433A - Photoreceiver - Google Patents

Photoreceiver

Info

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
Application number
JP13959079A
Other languages
Japanese (ja)
Other versions
JPS6351420B2 (en
Inventor
Takeshi Usui
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 JP13959079A priority Critical patent/JPS5662433A/en
Publication of JPS5662433A publication Critical patent/JPS5662433A/en
Publication of JPS6351420B2 publication Critical patent/JPS6351420B2/ja
Granted legal-status Critical Current

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.
JP13959079A 1979-10-29 1979-10-29 Photoreceiver Granted JPS5662433A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5039863A (en) * 1973-07-06 1975-04-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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