JPS63168638U - - Google Patents
Info
- Publication number
- JPS63168638U JPS63168638U JP5953187U JP5953187U JPS63168638U JP S63168638 U JPS63168638 U JP S63168638U JP 5953187 U JP5953187 U JP 5953187U JP 5953187 U JP5953187 U JP 5953187U JP S63168638 U JPS63168638 U JP S63168638U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- error signal
- capstan motor
- speed
- 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
Links
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案に係るキヤプスタンモータの駆
動制御回路の実施例を示すブロツク図、第２図ａ
〜ｈは再生時における各種信号のタイミングを示
すタイミング図、第３図ａ〜ｃは記録時における
トラツキングコントロール信号の作成を示すタイ
ミング図、第４図は小径の回転ドラムを使用した
場合のビデオヘツドの配置とトラツクの配置を示
す模式図である。
１…コントロールヘツド、４…デユーテイ検出
器、５…位相比較回路、７…キヤプスタンモータ
速度制御系、１２…キヤプスタンモータ。
Fig. 1 is a block diagram showing an embodiment of a capstan motor drive control circuit according to the present invention, and Fig. 2a
- h are timing diagrams showing the timing of various signals during playback, Fig. 3 a - c are timing diagrams showing the creation of tracking control signals during recording, and Fig. 4 is a video when a small diameter rotating drum is used. FIG. 3 is a schematic diagram showing the arrangement of heads and tracks. DESCRIPTION OF SYMBOLS 1... Control head, 4... Duty detector, 5... Phase comparison circuit, 7... Capstan motor speed control system, 12... Capstan motor.
Claims (1)
４回転で磁気テープ上に書き込み、再生するヘリ
カルスキヤン方式の磁気記録再生装置において、 トラツキングコントロール信号は１フレーム毎
に異なるデユーテイで記録され、再生時、キヤプ
スタンサーボの位相制御用の位相比較信号の検出
が２フレーム毎になされ、該位相比較信号と基準
位相信号とを比較して出力される位相誤差信号は
キヤプスタンモータの速度制御系における速度誤
差信号に加算されてキヤプスタンモータの駆動制
御信号となされることを特徴とするキヤプスタン
モータの駆動制御回路。[Scope of claim for utility model registration] The video signal for one field is transferred to the rotating drum 3/
In a helical scan type magnetic recording and reproducing device that writes and reproduces data on a magnetic tape in four rotations, tracking control signals are recorded at different duty rates for each frame, and during reproduction, the tracking control signal is used for phase comparison for phase control of the capstan servo. The signal is detected every two frames, and the phase error signal output by comparing the phase comparison signal and the reference phase signal is added to the speed error signal in the speed control system of the capstan motor, and the phase error signal is added to the speed error signal in the speed control system of the capstan motor. A drive control circuit for a capstan motor, characterized in that the drive control signal is a drive control signal of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5953187U JPS63168638U (en) | 1987-04-20 | 1987-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5953187U JPS63168638U (en) | 1987-04-20 | 1987-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63168638U true JPS63168638U (en) | 1988-11-02 |
Family
ID=30891109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5953187U Pending JPS63168638U (en) | 1987-04-20 | 1987-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63168638U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59217257A (en) * | 1983-05-24 | 1984-12-07 | Victor Co Of Japan Ltd | Control pulse discriminating circuit |
| JPS59217256A (en) * | 1983-05-24 | 1984-12-07 | Victor Co Of Japan Ltd | Recording and reproducing device |
| JPS61239455A (en) * | 1985-04-16 | 1986-10-24 | Matsushita Electric Ind Co Ltd | Video tape recorder |
-
1987
- 1987-04-20 JP JP5953187U patent/JPS63168638U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59217257A (en) * | 1983-05-24 | 1984-12-07 | Victor Co Of Japan Ltd | Control pulse discriminating circuit |
| JPS59217256A (en) * | 1983-05-24 | 1984-12-07 | Victor Co Of Japan Ltd | Recording and reproducing device |
| JPS61239455A (en) * | 1985-04-16 | 1986-10-24 | Matsushita Electric Ind Co Ltd | Video tape recorder |
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