JPS61189427U - - Google Patents

Info

Publication number
JPS61189427U
JPS61189427U JP1985074492U JP7449285U JPS61189427U JP S61189427 U JPS61189427 U JP S61189427U JP 1985074492 U JP1985074492 U JP 1985074492U JP 7449285 U JP7449285 U JP 7449285U JP S61189427 U JPS61189427 U JP S61189427U
Authority
JP
Japan
Prior art keywords
time
counter
pulse
signal
rotating body
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
JP1985074492U
Other languages
English (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 JP1985074492U priority Critical patent/JPS61189427U/ja
Priority to KR2019860005641U priority patent/KR900005075Y1/ko
Priority to US06/863,090 priority patent/US4706137A/en
Priority to DE19863616726 priority patent/DE3616726A1/de
Publication of JPS61189427U publication Critical patent/JPS61189427U/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads

Landscapes

  • Television Signal Processing For Recording (AREA)

Description

【図面の簡単な説明】
第１図は本考案回路の一実施例を示す回路系統
図、第２図は第１図図示回路系統の動作説明図、
第３図は本考案回路を適用し得るヘツド配置等の
一例を示す図である。 １……ＰＧパルス入力端子、２……ＦＧパルス
入力端子、３……６０進フリーランカウンタ、４
……補正カウンタ、５……クロツク端子、６……
ラツチメモリ、９……単安定マルチバイブレータ
（モノマルチ）、１４，１８……ＲＳフリツプフ
ロツプ、１５，１９……ヘツド切換信号出力端子
、２１……回転ドラム、２２……マグネツト、２
３……ＰＧパルス発生用ＰＧヘツド、２５……磁
気テープ、ＨＳ１，ＨＳ２……標準モード用回個
ヘツド、ＨＬ１，ＨＬ２……長時間モード用回転
ヘツド。

Claims (1)

    【実用新案登録請求の範囲】
  1. 磁気テープが所定角度範囲に亘つて巻回されて
    いる回転体の回転面に相対向して取付けられた一
    対の回転ヘツドが少なくとも一組ある該回転ヘツ
    ドのうち、上記磁気テープを走査中の一つの回転
    ヘツドの再生信号を選択出力するように切換える
    ためのヘツド切換信号を生成する回路において、
    該回転体の１回転毎に第１のパルスを発生出力す
    る手段と、該回転体の回転速度に応じた周期の第
    ２のパルスを該回転体の１回転当り一定数発生出
    力する手段と、該第２のパルスを計数し該第１の
    パルスでリセツトされる第１のカウンタと、該回
    転体の１回転毎に該第１のカウンタ出力によりリ
    セツトされ、該第１のパルスの入来時点よりその
    直後の第２のパルス入来時点までの第１の時間ク
    ロツクを計数すると共に、該第１のカウンタの計
    数値が所定値となつた時点から再び計数を開始し
    該第２のパルスの一周期より該第１の時間を差し
    引いた第２の時間上記クロツクを計数した時点で
    オーバーフロー信号を出力する第２のカウンタと
    、該第２のカウンタの該第１の時間の計数値を記
    憶し該第１のカウンタの計数値が上記所定値とな
    る以前に該記憶計数値を読み出されて該第２のカ
    ウンタにロードするメモリと、該第１のパルス又
    は該オーバーフロー信号が入来した時点より一定
    時間遅延された信号を出力する遅延回路と、該遅
    延回路の出力信号が入来する毎に極性が反転する
    信号を発生して前記ヘツド切換信号として出力す
    る回路とより構成したヘツド切換信号生成回路。
JP1985074492U 1985-05-20 1985-05-20 Pending JPS61189427U (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1985074492U JPS61189427U (ja) 1985-05-20 1985-05-20
KR2019860005641U KR900005075Y1 (ko) 1985-05-20 1986-04-25 헤드 전환 신호 생성회로
US06/863,090 US4706137A (en) 1985-05-20 1986-05-14 Head switching signal producing circuit with compensation of a phase error due to the positioning of a rotary drum head and a rotational phase detector
DE19863616726 DE3616726A1 (de) 1985-05-20 1986-05-17 Schaltung zum erzeugen eines kopfumschaltsignals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985074492U JPS61189427U (ja) 1985-05-20 1985-05-20

Publications (1)

Publication Number Publication Date
JPS61189427U true JPS61189427U (ja) 1986-11-26

Family

ID=13548851

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985074492U Pending JPS61189427U (ja) 1985-05-20 1985-05-20

Country Status (4)

Country Link
US (1) US4706137A (ja)
JP (1) JPS61189427U (ja)
KR (1) KR900005075Y1 (ja)
DE (1) DE3616726A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6459660A (en) * 1987-08-31 1989-03-07 Sony Corp Switching pulse generating device for rotary drum

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2557842B2 (ja) * 1986-03-31 1996-11-27 株式会社東芝 回転ヘツドの回転位相発生装置
DE3629481A1 (de) * 1986-08-29 1988-03-03 Thomson Brandt Gmbh Videorecorder
US5237461A (en) * 1987-06-03 1993-08-17 Robert Bosch Gmbh Method and apparatus for reproducing video data stored on a magnetic tape in a manner facilitating search and slow-motion operation
US5278705A (en) * 1991-12-03 1994-01-11 Samsung Electronics Co., Ltd. Phase correction circuit
DE4338391A1 (de) * 1993-11-10 1995-05-11 Philips Patentverwaltung Vorrichtung zur Erzeugung von Kopfschaltsignalen für ein Magnetbandgerät
EP1001533B1 (en) * 1998-11-14 2001-09-26 Agilent Technologies Inc. a Delaware Corporation Timing generator
TWI569069B (zh) * 2011-04-04 2017-02-01 Ｌｇ伊諾特股份有限公司 背光單元及其顯示設備

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1017443A (en) * 1973-11-26 1977-09-13 Takayuki Sagishima Vtr signal discriminating apparatus in a television receiver
JPS5631662B2 (ja) * 1974-07-17 1981-07-22
CH584494A5 (ja) * 1974-10-17 1977-01-31 Grundig Emv
JPS5683812A (en) * 1979-12-11 1981-07-08 Matsushita Electric Ind Co Ltd Video tape recorder
AU558680B2 (en) * 1982-11-18 1987-02-05 Victor Company Of Japan Limited 4-head type v.t.r. signal switching
ATE33078T1 (de) * 1982-12-27 1988-04-15 Telefunken Fernseh & Rundfunk Wiedergabeeinrichtung fuer ein mit mehreren koepfen aufgezeichnetes digitalsignal.
DE3306791A1 (de) * 1983-02-26 1984-08-30 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung in einem video-magnetbandgeraet
JPS6069975A (ja) * 1983-09-26 1985-04-20 Victor Co Of Japan Ltd 変速再生時における回転ヘツドの再生信号切換回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6459660A (en) * 1987-08-31 1989-03-07 Sony Corp Switching pulse generating device for rotary drum

Also Published As

Publication number Publication date
KR900005075Y1 (ko) 1990-06-08
DE3616726A1 (de) 1986-11-20
DE3616726C2 (ja) 1988-07-14
KR860015315U (ko) 1986-12-30
US4706137A (en) 1987-11-10

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