JPS5586232A - Analog light communication unit - Google Patents

Analog light communication unit

Info

Publication number
JPS5586232A
JPS5586232A JP16370978A JP16370978A JPS5586232A JP S5586232 A JPS5586232 A JP S5586232A JP 16370978 A JP16370978 A JP 16370978A JP 16370978 A JP16370978 A JP 16370978A JP S5586232 A JPS5586232 A JP S5586232A
Authority
JP
Japan
Prior art keywords
photo
pulse
polarity
positive
output
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
JP16370978A
Other languages
Japanese (ja)
Inventor
Seiichi Takeuchi
Masaaki Kato
Mitsuaki Nishie
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP16370978A priority Critical patent/JPS5586232A/en
Publication of JPS5586232A publication Critical patent/JPS5586232A/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
    • H04B10/25—Arrangements specific to fibre transmission

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 carry out secure photo transmission of an analog signal by sending photo signals of a fixed level, more than the fixed level and zero level from a transmission part in respond to outputs of an operational amplifier and then by detecting them by a reception part to generate analog signals. CONSTITUTION:In a transmission part, negative-polarity pulse generator 12 generates a negative-polarity pulse of amplitude and pulse width equal to a positive- polarity pulse right after the positive-polarity pulse outputted by a voltage-frequency converter. Then, operational amplifier 15 mixes respective pulses outputted by generator 12 to obtain the pattern of a composite pulse of multi-polarity and LED17 obtains outputs of a fixed level, more than it and zero level according to the zero, positive and negative polarities of the output of circuit 15. In a reception part, photo detecting element 51' receives a transmitted photo signal and comparator 53' detects via an AC coupling method the output of element 51' to convert its output into an analog electric signal through frequency-voltage conversion. Consequently, secure photo transmission of the analog signal can be done.
JP16370978A 1978-12-23 1978-12-23 Analog light communication unit Pending JPS5586232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16370978A JPS5586232A (en) 1978-12-23 1978-12-23 Analog light communication unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16370978A JPS5586232A (en) 1978-12-23 1978-12-23 Analog light communication unit

Publications (1)

Publication Number Publication Date
JPS5586232A true JPS5586232A (en) 1980-06-28

Family

ID=15779135

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16370978A Pending JPS5586232A (en) 1978-12-23 1978-12-23 Analog light communication unit

Country Status (1)

Country Link
JP (1) JPS5586232A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143658A (en) * 1982-02-19 1983-08-26 Hitachi Cable Ltd Data transmitting system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945674A (en) * 1972-09-01 1974-05-01
JPS4994308A (en) * 1973-01-11 1974-09-07
JPS5098204A (en) * 1973-12-26 1975-08-05
JPS5226108A (en) * 1975-08-25 1977-02-26 Tamura Electric Works Ltd Data transmission system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945674A (en) * 1972-09-01 1974-05-01
JPS4994308A (en) * 1973-01-11 1974-09-07
JPS5098204A (en) * 1973-12-26 1975-08-05
JPS5226108A (en) * 1975-08-25 1977-02-26 Tamura Electric Works Ltd Data transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58143658A (en) * 1982-02-19 1983-08-26 Hitachi Cable Ltd Data transmitting system

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