JPH0360291A - ディジタルvtr - Google Patents

ディジタルvtr

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Publication number
JPH0360291A
JPH0360291A JP1194115A JP19411589A JPH0360291A JP H0360291 A JPH0360291 A JP H0360291A JP 1194115 A JP1194115 A JP 1194115A JP 19411589 A JP19411589 A JP 19411589A JP H0360291 A JPH0360291 A JP H0360291A
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Japan
Prior art keywords
circuit
pulse
signal
clock
pll
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Granted
Application number
JP1194115A
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JP3028819B2 (ja
Inventor
Masuo Umemoto
梅本 益雄
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Hitachi Ltd
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Hitachi Ltd
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Priority to JP01194115A priority Critical patent/JP3028819B2/ja
Publication of JPH0360291A publication Critical patent/JPH0360291A/ja
Application granted granted Critical
Publication of JP3028819B2 publication Critical patent/JP3028819B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H01L24/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L24/02Bonding areas ; Manufacturing methods related thereto
    • H01L24/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L24/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
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    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/0401Bonding areas specifically adapted for bump connectors, e.g. under bump metallisation [UBM]
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    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/05001Internal layers
    • H01L2224/0502Disposition
    • H01L2224/05026Disposition the internal layer being disposed in a recess of the surface
    • H01L2224/05027Disposition the internal layer being disposed in a recess of the surface the internal layer extending out of an opening
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    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
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    • H01L2224/05099Material
    • H01L2224/051Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • H01L2224/05117Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 400°C and less than 950°C
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    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
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    • H01L2224/05099Material
    • H01L2224/051Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
    • H01L2224/05138Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
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    • H01L2224/051Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
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    • H01L2224/12Structure, shape, material or disposition of the bump connectors prior to the connecting process
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    • H01L2224/13001Core members of the bump connector
    • H01L2224/13005Structure
    • H01L2224/13006Bump connector larger than the underlying bonding area, e.g. than the under bump metallisation [UBM]
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    • H01L2924/151Die mounting substrate
    • H01L2924/156Material
    • H01L2924/15786Material with a principal constituent of the material being a non metallic, non metalloid inorganic material
    • H01L2924/15787Ceramics, e.g. crystalline carbides, nitrides or oxides

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Television Signal Processing For Recording (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (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〕 本発明はディジタルVTRにおけるクロック抽出回路、
とくに位相同期(Phase Lock Loop以下
、PLLと略す。)回路に関する。
〔従来の技術〕
従来からPLL回路をディジタルVTRのクロック抽出
回路に用いる事は多くの提案があり、例えば特公昭62
−47375に示されている。
〔発明が解決しようとする課題〕
上記した例の如き従来技術は、PLL回路のディジタル
VTRへの適用に関する種々の11!題(例えば、記録
時と異なる速度で再生するときのPLLの構成、応答性
の敗善など)に対する対策を提供している。しかし、デ
ィジタルVTRでは磁気テープと磁気ヘッドが接触した
状態で使用することが前提とされるため1例えば、磁気
テープにキズがつく、磁気ヘッドにゴミが付くなどの事
故が発生し、再生信号のS/Nが極端に低下し、再生デ
ータからクロック成分が抽出できない状態が発生するこ
とがある。
従来のPLL回路においてはこれらの対処について充分
な検討がなされておらず、ディジタルV’rR全体のシ
ステムとしての使い勝手が低いという問題点があった。
本発明の目的はこのように、PLLのクロックと再生デ
ータがアンロック状態になった事を検出アラーム信号を
発生させ、装置の停止などの処置を取らせるなどの処理
を取らせ、VTRシステムの信頼性を向上させる工つの
手段を提供することである。
〔課題を解決するための手段〕
上記目的を達成するために、本発明においては磁気テー
プから得られた再生データはテープヘッド系の周波数特
性を補償され、その後、2値信号とされる。さらにこの
信号の立上り、立下りで所定のパルス幅を持つパルスを
発生させ、PLL回路で発生させたクロックを上記パル
スでラッチする。ラッチ出力はディジタルVTRの全体
システムの要求に従って加工され、アラーム情報等に利
用される。
〔作用〕
PLLIE回路で発生させたクロックは本来再生データ
に同期するように作製されているので、再生データで発
生させた所定パルスで、クロックをラッチすると、正常
(ロック)状態では、ラッチ出力はハイレベルを保つ、
一方、アンロック状態ではランダムにハイレベル、ロー
レベルが現われる。
よって、このラッチ出力を用いれば、容易にPLL出力
クロックと再生データ間のロック状態を検出することが
できる。
上記手段2作用の説明から5本発明は記録に用いた変調
コードと無関係にPLLのロック、アンロック状態が検
出できる。
〔実施例〕
以下、本発明の一実施例を図によって説明する。
第1図は実施例における信号系統図であり、第2図は第
1図の各部の波形を示す。
磁気テープ1に記録されていた信号は磁気ヘッド2によ
って再生され、再生等化回路3でテープヘッド系の周波
数特性が補正され、2値の信号Aとなる。信号Aの立上
り、立下りにおいて、再生データのパルス間隔の半分に
相当するパルス幅を有するパルスBがパルス発生口路4
で発生させられる。PLL回路11は位相検出回路5.
ローパスフィルタ6、電圧制御発振回路7で構成される
パルスBは位相検出回路5に人力され、電圧制御発振回
路7のクロック出力Cとの間の位相が検出される。位相
検出回路5の出力である位相誤差信号はローパスフィル
タ6を介して電圧制御発振回路7に入力され、再生デー
タパルスBとクロックCが同期するようにフィードバッ
クループが形成される。
信号Bの立下りでクロック出力Cをラッチ回路8でラッ
チすると、ラッチ出力りは第2図のように信号Bとクロ
ックCが同期している場合、ハイレベルとなる。
信号BとクロックCが同期していない場合はD′のよう
な信号となり、ハイレベルとローレベルがランダムに現
われる。
ローパスフィルタ9を通せば、信号りあるいはD′のレ
ベルがそれぞれおよそVおよび−V(ただしVは信号り
のパルス高)として得られるので、比較回路10の一方
の入力に一■の電圧を与えておけば。
比較回路10の出力はPLLIEJ路が再生データに同
期しているかどうかを示すことになる。
その他の実施例としては、第3図に示すように信号りを
ディジタルVTR全体をコントロールするシステム系1
2に送り、ラッチ回路12−1で間欠的に信号りをシス
テムに取り込む。間欠周期としてはたとえばテレビジョ
ンのフィールド周期(約15 m5ec)とすることが
適当である。
取り込んだ信号りが連続n回(nは10回程度で良い)
ローレベルであれば、P L L 回路がアンロック状
態であると判断できる。勿論ハイレベルが現われている
時はロック状態を表示する命令とする。
なお、V TRを記録時と異なるテープ速度で再生する
、いわゆるシャトル再生やスロー再生を行なう場合があ
る。この場合、記録トラックを横切るように再生ヘッド
が移動するので、再生信号はとぎれとぎれになる。この
ため、ノーマル再生以外ではPLL回路のアンロックは
PLL回路以外の原因で発生する。従ってノーマル再生
以外ではPLL回路のアンロックを表示しない事にする
また、ノーマル再生時でしかも連続n回信号りがローレ
ベルになった時にアンロック表示の命令を出すようにす
ることもできる。
なお、ノーマル再生時の中に同期再生(記録しながら再
生する場合)の状態も含めることができる。
〔発明の効果〕
本発明によれば、ノーマル再生時や同時再生時において
、PLLが正常に動作しているかどうかの情報を容易に
検出でき、それを表示させるシステムが実現できる。こ
のため、異常が発生した場合の故障場所をすばやく限定
することが可能となり、信頼性の高いVTRの操作が可
能となる。
【図面の簡単な説明】
第1図は本発明の一実施例の検出回路の回路ブロック図
、第2図は第1図における各部の信号波形図、第3図は
別の実施例のシステムフロー図である。 3・・・再生等化回路、8・・・ラッチ回路、1工・・
・PLL回路。 ■ >r 豹 図 図

Claims (1)

  1. 【特許請求の範囲】 1、再生データに同期したクロックを発生するPLL回
    路と、PLL回路の出力クロックを再生データでラット
    するラッチ回路を設けたことを特徴とするPLL回路の
    ロック、アンロック検出回路。 2、上記検出回路の出力信号をノーマル再生時だけ使用
    することを特徴とするVTRシステムコントロール系。
JP01194115A 1989-07-28 1989-07-28 Pll回路のロツク,アンロツク検出回路 Expired - Lifetime JP3028819B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP01194115A JP3028819B2 (ja) 1989-07-28 1989-07-28 Pll回路のロツク,アンロツク検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01194115A JP3028819B2 (ja) 1989-07-28 1989-07-28 Pll回路のロツク,アンロツク検出回路

Publications (2)

Publication Number Publication Date
JPH0360291A true JPH0360291A (ja) 1991-03-15
JP3028819B2 JP3028819B2 (ja) 2000-04-04

Family

ID=16319173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01194115A Expired - Lifetime JP3028819B2 (ja) 1989-07-28 1989-07-28 Pll回路のロツク,アンロツク検出回路

Country Status (1)

Country Link
JP (1) JP3028819B2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05211910A (ja) * 1992-02-10 1993-08-24 Yoshida Kogyo Kk <Ykk> シートクッション用の面ファスナー止具
JPH05211909A (ja) * 1992-02-10 1993-08-24 Yoshida Kogyo Kk <Ykk> シートクッション用の面ファスナー片連結体
US5342569A (en) * 1992-03-23 1994-08-30 Yoshida Kogyo K.K. Method of attaching a fastening tape to a molded article

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05211910A (ja) * 1992-02-10 1993-08-24 Yoshida Kogyo Kk <Ykk> シートクッション用の面ファスナー止具
JPH05211909A (ja) * 1992-02-10 1993-08-24 Yoshida Kogyo Kk <Ykk> シートクッション用の面ファスナー片連結体
US5342569A (en) * 1992-03-23 1994-08-30 Yoshida Kogyo K.K. Method of attaching a fastening tape to a molded article

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