JPS5843077U - Head switching circuit - Google Patents

Head switching circuit

Info

Publication number
JPS5843077U
JPS5843077U JP1981138062U JP13806281U JPS5843077U JP S5843077 U JPS5843077 U JP S5843077U JP 1981138062 U JP1981138062 U JP 1981138062U JP 13806281 U JP13806281 U JP 13806281U JP S5843077 U JPS5843077 U JP S5843077U
Authority
JP
Japan
Prior art keywords
playback
normal
special
head gap
head
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
JP1981138062U
Other languages
Japanese (ja)
Other versions
JPS6327503Y2 (en
Inventor
岩船　嘉助
Original Assignee
日本ビクター株式会社
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 日本ビクター株式会社 filed Critical 日本ビクター株式会社
Priority to JP1981138062U priority Critical patent/JPS5843077U/en
Priority to DE3234153A priority patent/DE3234153C2/en
Priority to KR2019820007331U priority patent/KR880003722Y1/en
Publication of JPS5843077U publication Critical patent/JPS5843077U/en
Application granted granted Critical
Publication of JPS6327503Y2 publication Critical patent/JPS6327503Y2/ja
Granted 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
    • G11B15/02—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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • 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

Landscapes

  • Television Signal Processing For Recording (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。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図はノーマル再生用回転ヘッドと特殊再生用回転ヘ
ッドとの取付状態を示す平面図、第２図は磁気テープ上
のトラックパターンと高速再生時のヘッド走査軌跡の一
例を示す図、第３図は高速再生モードよりノーマル再生
モードへ切換えたときのキャプスタンモータの回転数の
変化を示す図、第４図は本考案回路を有する磁気再生装
置の一実施例を示すブロック系統図である。Fig. 1 is a plan view showing the mounting state of the rotary head for normal playback and the rotary head for special playback, Fig. 2 is a view showing an example of the track pattern on the magnetic tape and the head scanning locus during high-speed playback, and Fig. 3 The figure shows the change in the rotational speed of the capstan motor when switching from the high-speed playback mode to the normal playback mode, and FIG. 4 is a block system diagram showing an embodiment of the magnetic playback device having the circuit of the present invention.

Claims (1)

【実用新案登録請求の範囲】 １　ノーマル再生時にはノーマル再生用ヘッドギャップ
により記録媒体上の既記緑信号を再生し、−特殊再生時
には該記録媒体をノーマル再生時とは異なる速度で走行
せしめて該記録媒体上の既記緑信号特殊再生用ヘッドギ
ャップにより再生する再生装置において、該記録媒体の
走行速度が略ノーマル再生時の速度であることを実質的
に検出するノーマル速度検出回路と、再生モードに応じ
たモード信号を発生する回路と、上記ノーマル再生用ヘ
ッドギャップと上記特殊再生用ヘッドギャップの各再生
信号のうちの一方を選択出力する切換スイッチと、該記
録媒体をノーマル再生時よりも速い速度で走行せしめる
特殊再生モードからノーマル再生モードへ切換えた時に
該切換時に直ちに出力される該モード信号発生回路より
のノーマル再生モード信号と該ノーマル速度検出回路の
出力検出信号とが夫々同時に供給゛されるまでは該切換
スイッチをして該特殊再生用ヘッドギャップ再生信号選
択出力接続状態を保ち、同時に供給されたときより該切
換スイッチをして該ノーマル再生用ヘッドギャップ再生
信号選択出力接続状態へ切換接続せしめる切換スイッチ
制御回路とより構成したヘッド切換回路。 ２　該ノーマル再生用へラドギャップは、互いにアジマ
ス角度の異なる複数個のノーマル再生用回転ヘッドより
なり、該特殊再生用ヘッドギャップは該複数個のノーマ
ル再生回転ヘッドのいずれか−の回転ヘッドと同一のア
ジマス角度のギャップを有し、かつ、トラック幅が大な
る特殊再生用回転ヘッドである実用新案登録請求の範囲
第１項記載のヘッド切換回路。[Claims for Utility Model Registration] 1. During normal playback, the recorded green signal on the recording medium is reproduced by the normal playback head gap, and - during special playback, the recording medium is run at a speed different from that during normal playback to A playback device that performs playback using a predetermined green signal special playback head gap on a recording medium, including a normal speed detection circuit that substantially detects that the running speed of the recording medium is approximately the speed during normal playback, and a playback mode. a circuit for generating a mode signal corresponding to the normal reproduction head gap; a changeover switch for selectively outputting one of the reproduction signals of the normal reproduction head gap and the special reproduction head gap; When switching from a special regeneration mode in which the vehicle is driven at a high speed to a normal regeneration mode, a normal regeneration mode signal from the mode signal generation circuit, which is immediately output at the time of switching, and an output detection signal from the normal speed detection circuit are supplied at the same time. Until the head gap playback signal selection output for special playback is supplied, turn the changeover switch to maintain the connection state for the head gap playback signal selection output for special playback, and at the same time, turn the changeover switch to switch to the connection state for the headgap playback signal selection output for normal playback. A head switching circuit consisting of a connecting switch control circuit and a head switching circuit. 2. The normal playback head gap is made up of a plurality of normal playback rotary heads having mutually different azimuth angles, and the special playback head gap is the same as any one of the plurality of normal playback rotary heads. 2. The head switching circuit according to claim 1, which is a rotary head for special playback having a gap with an azimuth angle of .
JP1981138062U 1981-09-17 1981-09-17 Head switching circuit Granted JPS5843077U (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1981138062U JPS5843077U (en) 1981-09-17 1981-09-17 Head switching circuit
DE3234153A DE3234153C2 (en) 1981-09-17 1982-09-15 Head switching circuit for a video display device
KR2019820007331U KR880003722Y1 (en) 1981-09-17 1982-09-16 Head conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1981138062U JPS5843077U (en) 1981-09-17 1981-09-17 Head switching circuit

Publications (2)

Publication Number Publication Date
JPS5843077U true JPS5843077U (en) 1983-03-23
JPS6327503Y2 JPS6327503Y2 (en) 1988-07-25

Family

ID=15213083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1981138062U Granted JPS5843077U (en) 1981-09-17 1981-09-17 Head switching circuit

Country Status (3)

Country Link
JP (1) JPS5843077U (en)
KR (1) KR880003722Y1 (en)
DE (1) DE3234153C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936487A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Magnetic reproducer
JPS6069975A (en) * 1983-09-26 1985-04-20 Victor Co Of Japan Ltd Reproducing signal switching circuit of rotary head at variable speed reproduction

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629532Y2 (en) * 1978-10-16 1987-03-05

Also Published As

Publication number Publication date
JPS6327503Y2 (en) 1988-07-25
DE3234153A1 (en) 1983-04-07
KR880003722Y1 (en) 1988-10-15
KR840001755U (en) 1984-05-17
DE3234153C2 (en) 1985-03-14

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