JPS63138748U - - Google Patents

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Publication number
JPS63138748U
JPS63138748U JP1987030977U JP3097787U JPS63138748U JP S63138748 U JPS63138748 U JP S63138748U JP 1987030977 U JP1987030977 U JP 1987030977U JP 3097787 U JP3097787 U JP 3097787U JP S63138748 U JPS63138748 U JP S63138748U
Authority
JP
Japan
Prior art keywords
signal
data signal
input state
nrz
conversion 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
JP1987030977U
Other languages
Japanese (ja)
Other versions
JPH0735473Y2 (en
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 filed Critical
Priority to JP1987030977U priority Critical patent/JPH0735473Y2/en
Publication of JPS63138748U publication Critical patent/JPS63138748U/ja
Application granted granted Critical
Publication of JPH0735473Y2 publication Critical patent/JPH0735473Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Dc Digital Transmission (AREA)
  • Optical Communication System (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク構成
図。第２図はその各部の動作波形図。第３図は従
来例を示すブロツク構成図。 １……識別再生回路、２，１４……信号分岐回
路、３……ＮＲＺ・ＲＺ変換回路、４……発光素
子駆動回路、５……基準信号発生器、７……無入
力状態指示データ信号発生器、９，１２，１３…
…信号選択回路、１０……タイミング信号有無判
定回路、１１……選択信号発生回路、１５……発
光素子、１６……フリツプフロツプ回路、Ａ……
データ信号入力端子、Ｂ……タイミング信号入力
端子、Ｄ……データ信号、Ｄ′……ＮＲＺデータ
信号、Ｄ″……ＲＺデータ信号、ｄ……無信号状
態指示信号、ｄ′……選択信号、Ｓ……無入力状
態指示ＮＲＺデータ信号、Ｓ′，Ｓ″……無入力
状態指示ＲＺデータ信号、Ｔ，Ｔ′……タイミン
グ信号。 FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is an operational waveform diagram of each part. FIG. 3 is a block diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1...Identification regeneration circuit, 2, 14...Signal branch circuit, 3...NRZ/RZ conversion circuit, 4...Light emitting element drive circuit, 5...Reference signal generator, 7...No input state instruction data signal Generator, 9, 12, 13...
...Signal selection circuit, 10... Timing signal presence/absence determination circuit, 11... Selection signal generation circuit, 15... Light emitting element, 16... Flip-flop circuit, A...
Data signal input terminal, B...timing signal input terminal, D...data signal, D'...NRZ data signal, D''...RZ data signal, d...no signal state instruction signal, d'...selection signal , S...No input state indicating NRZ data signal, S', S''...No input state indicating RZ data signal, T, T'...Timing signal.

Claims (1)

【実用新案登録請求の範囲】 識別再生されたＮＲＺデータ信号（Ｄ′）をＲ
Ｚデータ信号（Ｄ″）に変換するＮＲＺ・ＺＲ変
換回路３を備えた光中継器において、 無入力状態指示ＲＺデータ信号（Ｓ′）を発生
する無入力状態指示データ発生手段５、７ａと、 入力信号しや断時に、上記無入力状態指示ＲＺ
データ信号を上記ＮＲＺ・ＲＺ変換回路に入力す
る信号選択手段９と を備えたことを特徴とする光中継器。[Claims for Utility Model Registration] R
In an optical repeater equipped with an NRZ/ZR conversion circuit 3 for converting into a Z data signal (D''), no-input state indication data generating means 5, 7a generates a no-input state indication RZ data signal (S'); When the input signal is interrupted, the above-mentioned no-input state instruction RZ
An optical repeater comprising signal selection means 9 for inputting a data signal to the NRZ/RZ conversion circuit.
JP1987030977U 1987-03-03 1987-03-03 Optical repeater Expired - Lifetime JPH0735473Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987030977U JPH0735473Y2 (en) 1987-03-03 1987-03-03 Optical repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987030977U JPH0735473Y2 (en) 1987-03-03 1987-03-03 Optical repeater

Publications (2)

Publication Number Publication Date
JPS63138748U true JPS63138748U (en) 1988-09-13
JPH0735473Y2 JPH0735473Y2 (en) 1995-08-09

Family

ID=30836282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987030977U Expired - Lifetime JPH0735473Y2 (en) 1987-03-03 1987-03-03 Optical repeater

Country Status (1)

Country Link
JP (1) JPH0735473Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002033921A1 (en) * 2000-10-13 2002-04-25 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for optical transmission

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248051A (en) * 1984-05-23 1985-12-07 Nec Corp Digital relay transmission system
JPS61172462A (en) * 1985-01-28 1986-08-04 Nec Corp Optical relay transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248051A (en) * 1984-05-23 1985-12-07 Nec Corp Digital relay transmission system
JPS61172462A (en) * 1985-01-28 1986-08-04 Nec Corp Optical relay transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002033921A1 (en) * 2000-10-13 2002-04-25 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for optical transmission

Also Published As

Publication number Publication date
JPH0735473Y2 (en) 1995-08-09

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