JPH01166648A - 符号誤り警報回路 - Google Patents

符号誤り警報回路

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Publication number
JPH01166648A
JPH01166648A JP62326268A JP32626887A JPH01166648A JP H01166648 A JPH01166648 A JP H01166648A JP 62326268 A JP62326268 A JP 62326268A JP 32626887 A JP32626887 A JP 32626887A JP H01166648 A JPH01166648 A JP H01166648A
Authority
JP
Japan
Prior art keywords
code
level
code error
discriminator
identification
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
JP62326268A
Other languages
English (en)
Inventor
Yoshihiro Dobashi
土橋　義裕
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
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 filed Critical NEC Corp
Priority to JP62326268A priority Critical patent/JPH01166648A/ja
Publication of JPH01166648A publication Critical patent/JPH01166648A/ja
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/521—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by spin coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/526—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
    • B29C65/542—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts by injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B29C66/452—Joining of substantially the whole surface of the articles the article having a disc form, e.g. making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dc Digital Transmission (AREA)
  • Optical Communication System (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、光受信器の符号誤り警報回路に関し、特に受
光素子としてＡＰＤ　（アバランシェフォトダイオード
）を使用している光受信器の光受信レベルの変動による
符号誤り警報回路に関する。
（従来の技術及びその問題点） 従来、この種の符号誤り警報回路は、光伝送符号の符号
則の乱れや冗長化符号を監視することにより、符号誤り
を検出し、警報を発生していた。
ところが、符号則の乱れや冗長化符号を監視して符号誤
りを検出するには規模の大きい回路を必要とするという
問題点があった。
本発明の目的は、小さい回路規模で符号誤りを検出でき
る符号誤り警報回路の提供にある。
（問題点を解決するための手段） 前述の問題点を解決するために本発明が提供する手段は
、光信号をアバランシェフォトダイオードで電気信号に
変換し、その電気信号を増幅して第１の符号識別器に供
給し、前記光信号に含まれている符号をその第１の符号
識別器で再生し、前記増幅器の出力レベルを前記アバラ
ンシェフォトダイオードに負帰還して前記第１の符号識
別器を入力レベルを安定化する光受信器の符号誤り警報
回路であって、 前記増幅器に出力を受けて前記光信号に含まれる符号を
それぞれ再生する第２及び第３の符号識別器と、前記第
１、第２及び第３の符号識別器で再生された前記符号が
互いに一致しないときに警報を発生する手段とを備え、 前記第１の符号識別器で符号の再生が誤りなくできる前
記光信号のレベルの最大値および最小値で符号誤りを生
じる大きさに、前記第２及び第３の符号識別器の符号識
別量値がそれぞれ設定してあることを特徴とする。
（実施例） 次に本発明について図面を参照して説明する。
第１図は本発明の一実施例の符号誤り警報回路１３を備
える光受信器のブロック図である。ＡＰＤ２は、光フア
イバケーブル１から伝送された光信号を電気信号に変換
する。増幅器３はその電気信号を増幅する。識別器４は
増幅器３の出力の電気信号に含まれる符号を再生する。
この識別器４の識別レベルはＸｔｋに調整されている。
同様に増幅器３の出力信号は識別レベルがＸ、４及びＸ
、で調整された識別器６及び７にそれぞれ加えられ、符
号が再生される。識別器４，６．７で再生される符号は
論理値“１″又は“０”を表わしている。
また識別器４．６．７の入力信号の振幅を常に一定に保
つため増幅器３の出力信号の一部は自動利得制御器５で
検出され、この自動利得制御器５の発生する制御電圧に
より、増幅器３の利得及びＡＰＤ２の増倍率を制御する
。比較器８は、識別器４．６．７で再生された符号を互
いに比較し、３個の再生符号が一致しない場合は警報器
９に警報信号を送出する。
ここで、識別器の最適識別レベルは増幅器３の基本雑音
とＡＰＤ２の光電変換におけるショット雑音に依存し、
また基本雑音及びショット雑音は増幅器３の利得及びＡ
ＰＤ２の増倍率によりそれぞれ変化するから、光受信器
の光受信レベルにより最適識別判定値のレベルは異なる
。
識別器４の識別レベルＸ　ｔ　ｂは標準光受信レベルで
調整されているから、識別器４で符号誤りを発生しない
で識別再生ができる光受信レベルの最大及び最小の受信
レベルが定まる。Ｉｉ別器６の識別レベルＸ１１は最大
光受信レベル付近で符号誤りを発生するように、また識
別器７のレベルＸＬは最小光受信レベル付近で符号誤り
を発生するようにそれぞれ調整されている。
したがって、光受信レベルの最大および最小付近では、
識別器４，６．７で再生された信号の符号は一致しない
から、比較器８で警報信号を生成し、警報器９から警報
を発生することが出来る。
（発明の効果） 以上に説明したように本発明符号誤り警報回路は、光受
信器の最大光受信レベル及び最小光受信レベル付近に於
いてそれぞれ符号誤りを発生するように調整された識別
器により、光受信レベルの変動による符号誤りを警報で
きる。また、本発明の符号誤り警報回路では、警報が発
生する光受信レベルが任意に識別レベルを調整すること
により簡単に設定でき、光受信レベルの変動による符号
誤りを未然にかつ経済的に防止できる。
【図面の簡単な説明】
第１図は本発明の一実施例の符号誤り警報回路を備える
光受信器のブロック図である。 １・・・光フアイバケーブル、２・・・ＡＰＤ　（アバ
ランシェフォトダイオード）、３・・・増幅器、４・・
・識別器、５・・・自動利得制御器、６・・・識別器、
７・・・識別器、８・・・比較器、９・・・警報器、１
３・・・符号誤り警報回路。

Claims (1)

  1. 【特許請求の範囲】 　光信号をアバランシェフォトダイオードで電気信号に
    変換し、その電気信号を増幅して第１の符号識別器に供
    給し、前記光信号に含まれている符号をその第１の符号
    識別器で再生し、前記増幅器の出力レベルを前記アバラ
    ンシェフォトダイオードに負帰還して前記第１の符号識
    別器の入力レベルを安定化する光受信器の符号誤り警報
    回路において、 前記増幅器の出力を受けて前記光信号に含まれる符号を
    それぞれ再生する第２及び第３の符号識別器と、前記第
    １、第２及び第３の符号識別器で再生された前記符号が
    互いに一致しないときに警報を発生する手段とを備え、 前記第１の符号識別器で符号の再生が誤りなくできる前
    記光信号のレベルの最大値および最小値で符号誤りを生
    じる大きさに、前記第２及び第３の符号識別器の符号識
    別閾値がそれぞれ設定してあることを特徴とする符号誤
    り警報回路。
JP62326268A 1987-12-22 1987-12-22 符号誤り警報回路 Pending JPH01166648A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62326268A JPH01166648A (ja) 1987-12-22 1987-12-22 符号誤り警報回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62326268A JPH01166648A (ja) 1987-12-22 1987-12-22 符号誤り警報回路

Publications (1)

Publication Number Publication Date
JPH01166648A true JPH01166648A (ja) 1989-06-30

Family

ID=18185872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62326268A Pending JPH01166648A (ja) 1987-12-22 1987-12-22 符号誤り警報回路

Country Status (1)

Country Link
JP (1) JPH01166648A (ja)

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