JPS57181246A - Optical transmitting circuit - Google Patents

Optical transmitting circuit

Info

Publication number
JPS57181246A
JPS57181246A JP56066705A JP6670581A JPS57181246A JP S57181246 A JPS57181246 A JP S57181246A JP 56066705 A JP56066705 A JP 56066705A JP 6670581 A JP6670581 A JP 6670581A JP S57181246 A JPS57181246 A JP S57181246A
Authority
JP
Japan
Prior art keywords
circuit
distortion
light source
output
light
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
JP56066705A
Other languages
Japanese (ja)
Inventor
Takashi Shinoda
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 JP56066705A priority Critical patent/JPS57181246A/en
Publication of JPS57181246A publication Critical patent/JPS57181246A/en
Pending 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
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/502—LED transmitters
    • 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
    • H04B10/50—Transmitters
    • H04B10/58—Compensation for non-linear transmitter output

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Nonlinear Science (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To apply an adequate amount of distortion to a light source automatically by providing light sources having similar distortion characteristics, converting the output light of one of the light source into an electric signal, and then negatively feeding the signal back to an input signal. CONSTITUTION:An input signal applied to an input terminal 1 is supplied to a driving circuit 3 after the output voltage of an amplifying circuit 7 is subtracted from the input signal by an adding circuit 2. The output voltage of the circuit 3 drives light sources 4 and 5. The output light of the light source 4 is led out by a coupling circuit 8. The output of the light source 5, on the other hand, is converted by a photodetector 6 into an electric signal, which is amplified by a circuit 7 and supplied to the circuit 2. Therefore, distortion having the polarity with which the distortion of the light source 5 is compensated is generated automatically at the output of the driving circuit 3 by an enough amount to nearly cancel the distortion.
JP56066705A 1981-04-30 1981-04-30 Optical transmitting circuit Pending JPS57181246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56066705A JPS57181246A (en) 1981-04-30 1981-04-30 Optical transmitting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56066705A JPS57181246A (en) 1981-04-30 1981-04-30 Optical transmitting circuit

Publications (1)

Publication Number Publication Date
JPS57181246A true JPS57181246A (en) 1982-11-08

Family

ID=13323613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56066705A Pending JPS57181246A (en) 1981-04-30 1981-04-30 Optical transmitting circuit

Country Status (1)

Country Link
JP (1) JPS57181246A (en)

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