JPS57157644A - Transmitting system - Google Patents

Transmitting system

Info

Publication number
JPS57157644A
JPS57157644A JP56042458A JP4245881A JPS57157644A JP S57157644 A JPS57157644 A JP S57157644A JP 56042458 A JP56042458 A JP 56042458A JP 4245881 A JP4245881 A JP 4245881A JP S57157644 A JPS57157644 A JP S57157644A
Authority
JP
Japan
Prior art keywords
comparator
threshold
cutting
receiving
balanced type
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
JP56042458A
Other languages
Japanese (ja)
Inventor
Hideaki Murayama
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP56042458A priority Critical patent/JPS57157644A/en
Publication of JPS57157644A publication Critical patent/JPS57157644A/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
    • H04B10/60—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 the need for setting threshold at every time, by using a balanced type pulse code, by cutting the DC component of a received signal at a receiving side circuit, and by setting the threshold of a comparator to 0 volt. CONSTITUTION:A capacitor 8 for cutting DC is inserted between an amplifier 5 and a comparator 6. The threshold of the comparator 6 is grounded and set to 0V. A balanced type pulse code is used as a transmitting code in optical transmission. When such arrangement is made, a receiving waveform varies around 0V, because the waveform is subjected to the DC cut, and thus, the pulse can be discriminated without adjustment regardless of variations in the level of the receiving electric power.
JP56042458A 1981-03-25 1981-03-25 Transmitting system Pending JPS57157644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042458A JPS57157644A (en) 1981-03-25 1981-03-25 Transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042458A JPS57157644A (en) 1981-03-25 1981-03-25 Transmitting system

Publications (1)

Publication Number Publication Date
JPS57157644A true JPS57157644A (en) 1982-09-29

Family

ID=12636621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042458A Pending JPS57157644A (en) 1981-03-25 1981-03-25 Transmitting system

Country Status (1)

Country Link
JP (1) JPS57157644A (en)

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