JPS5754443A - Optical pulse transmitting and receiving system - Google Patents

Optical pulse transmitting and receiving system

Info

Publication number
JPS5754443A
JPS5754443A JP55129592A JP12959280A JPS5754443A JP S5754443 A JPS5754443 A JP S5754443A JP 55129592 A JP55129592 A JP 55129592A JP 12959280 A JP12959280 A JP 12959280A JP S5754443 A JPS5754443 A JP S5754443A
Authority
JP
Japan
Prior art keywords
pulse
signal
time
output
delay circuit
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
JP55129592A
Other languages
Japanese (ja)
Other versions
JPS6324580B2 (en
Inventor
Kazumasa Tsukada
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 JP55129592A priority Critical patent/JPS5754443A/en
Publication of JPS5754443A publication Critical patent/JPS5754443A/en
Publication of JPS6324580B2 publication Critical patent/JPS6324580B2/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
    • H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control

Abstract

PURPOSE:To hold the operation of an automatic threshold value control, even at the time when a data pulse stops, by inserting a pulse to a transmission signal at the transmission side compulsively, if a time not producing data pulse is consecutive for a prescribed time or more. CONSTITUTION:An input data signal is inputted to a terminal A to be a signal A1 via a delay circuit T1 having a delay time of t1, and signal A2 via a delay circuit T2 having a delay time t2 and the a signal A1 enter an OR gate OR1 to be a signal A3. On the other hand, a pulse generator PG produces a pulse B having pulse interval t3 and pulse width t4, and the pulse is converted into an optical pulse D at an electric-photo converter EL for transmission. A half of the amplitude of the signal D1 is a threshold value at a peak detector PD constituting an automatic threshold control circuit and given to an identifier DT. The output D2 of the identifier DT and a signal D3 via a delay circuit T3 are inputted to an AND gate AND1 and the output A is a reception data output.
JP55129592A 1980-09-18 1980-09-18 Optical pulse transmitting and receiving system Granted JPS5754443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55129592A JPS5754443A (en) 1980-09-18 1980-09-18 Optical pulse transmitting and receiving system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55129592A JPS5754443A (en) 1980-09-18 1980-09-18 Optical pulse transmitting and receiving system

Publications (2)

Publication Number Publication Date
JPS5754443A true JPS5754443A (en) 1982-03-31
JPS6324580B2 JPS6324580B2 (en) 1988-05-21

Family

ID=15013250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55129592A Granted JPS5754443A (en) 1980-09-18 1980-09-18 Optical pulse transmitting and receiving system

Country Status (1)

Country Link
JP (1) JPS5754443A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007089850A (en) * 2005-09-29 2007-04-12 Takashi Ito Bathtub water sterilization apparatus and method
US10221080B2 (en) 2014-02-11 2019-03-05 Philips Lighting Holding B.V. Recipient with variable geometry for UV water purification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63205688A (en) * 1987-02-20 1988-08-25 松下電器産業株式会社 Glare-proof filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007089850A (en) * 2005-09-29 2007-04-12 Takashi Ito Bathtub water sterilization apparatus and method
US10221080B2 (en) 2014-02-11 2019-03-05 Philips Lighting Holding B.V. Recipient with variable geometry for UV water purification

Also Published As

Publication number Publication date
JPS6324580B2 (en) 1988-05-21

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