JPS60219681A - Feed drive controller - Google Patents

Feed drive controller

Info

Publication number
JPS60219681A
JPS60219681A JP7607284A JP7607284A JPS60219681A JP S60219681 A JPS60219681 A JP S60219681A JP 7607284 A JP7607284 A JP 7607284A JP 7607284 A JP7607284 A JP 7607284A JP S60219681 A JPS60219681 A JP S60219681A
Authority
JP
Japan
Prior art keywords
signal
drive
motor
pulse
comparator
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
JP7607284A
Other languages
Japanese (ja)
Inventor
Tsuneo Takahashi
恒夫 高橋
Akihiro Sakata
昭博 坂田
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7607284A priority Critical patent/JPS60219681A/en
Publication of JPS60219681A publication Critical patent/JPS60219681A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/02Driving or moving of heads
    • G11B21/08Track changing or selecting during transducing operation
    • G11B21/081Access to indexed tracks or parts of continuous track
    • G11B21/083Access to indexed tracks or parts of continuous track on discs

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To attain stable feed control by providing a circuit applying a pulse drive signal to drive a pickup in a desired direction to a feed drive circuit so as to prevent wear of a disc and a stylus. CONSTITUTION:An output signal (b) of a comparator 9 is integrated by an integration circuit 10 and inputted to a comparator 11. An input signal to the comparator 11 is set to c' by a DC voltage generator 13, and when the integrated signal is larger than the DC voltage c', a drive pulse (d) to drive a motor 6 is generated by a pulse generator 12. When a tracking signal does not exceed a prescribed voltage for a prescribed time in this way, a pulse drive signal is applied to a motor and when a locked track takes place, the tracking signal is less than the voltage a' and the pulse drive signal driving the motor is applied. A medium including the pickup is moved by the driving of the motor and the locked track is released.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は円盤状情報記録媒体(以下ディスクとよぶ)再
生装置において、前記媒体上に記録された情報トラック
をトラッキングする手段を含む担体(以下ピックアップ
を含む担体とよぶ)を移動せしめる送シ駆動制御装置に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disc-shaped information recording medium (hereinafter referred to as a disk) reproducing apparatus, which includes a carrier (hereinafter referred to as a pickup) that includes means for tracking information tracks recorded on the medium. This invention relates to a transport drive control device that moves a carrier (including carriers).

従来例の構成とその問題点 例えば、ビデオディスクプレーヤーにおいて、ディスク
上の信号を読み取るためのピックアップを含む担体を移
動せしめる送シ駆動制御には、一般的に低周波濾波器に
よシ低周波成分のみにしたトラッキング駆動信号或いは
トランキング誤差信号(以下、総称してトラッキング信
号とよぶ)が前記装置を移動せしめる駆動信号として用
いられる。第1図にその構成例を示す。
Conventional configurations and their problems For example, in a video disc player, a low frequency filter is generally used to control the transport drive that moves a carrier including a pickup for reading signals on the disc. A tracking drive signal or a trunking error signal (hereinafter collectively referred to as a tracking signal) is used as a drive signal to move the device. FIG. 1 shows an example of its configuration.

第1図において、再生された信号から抜取ったトラッキ
ング信号1は低周波濾波器(LPF)2により低周波成
分のみの信号に変換され、リミッタ回路3によシリミッ
タ幅を越える信号は制限される。これは、構なし静電容
量方式ビデオディスクプレーヤーの場合、ディスク上に
ゴミ、ホコリ等が付着していると針飛びが生じ、それに
よってトラッキング信号が乱れ、前記信号をピックアッ
プを含む担体を移動せしめる駆動信号に用いているだめ
、針飛びと同様に前記担体が誤動作することがある。そ
のため、リミッタ回路3によシ、前記担体の誤動作を最
小限に抑えるように駆動制御信号に制限を加えている。
In FIG. 1, a tracking signal 1 extracted from the reproduced signal is converted into a signal containing only low frequency components by a low frequency filter (LPF) 2, and a limiter circuit 3 limits signals exceeding the limiter width. . This is because, in the case of a capacitive video disc player, if dirt, dust, etc. adhere to the disc, stylus jump occurs, which disturbs the tracking signal and causes the carrier containing the signal pickup to move. If the drive signal is not used, the carrier may malfunction, similar to needle skipping. Therefore, the limiter circuit 3 imposes a limit on the drive control signal so as to minimize the malfunction of the carrier.

リミッタ回路3を通過した信号は次段のゲート回路4に
おいて、ゲート信号7によシ一定時間のみ前記信号をド
ライバ回路6に伝達する。前記信号は、ドライバ回路5
において、モーター6を駆動する駆動信号に変換され、
モーター6によシ所望の位置にピックアップを含む担体
を移動せしめる。
The signal that has passed through the limiter circuit 3 is transmitted to the driver circuit 6 for a certain period of time by the gate signal 7 in the next stage gate circuit 4. The signal is transmitted to the driver circuit 5
, it is converted into a drive signal for driving the motor 6,
The carrier including the pickup is moved to a desired position by the motor 6.

本構成では、ディスク上のキズ等によりロックドトラッ
クが発生した場合、モーター6を駆動せしめるトラッキ
ング信号が微小にな夛、そのため駆動信号がモーターの
不感帯の領域内におさまることになるため、ロックドト
ラックを解除することができないという問題点がある。
In this configuration, when a locked track occurs due to a scratch on the disk, the tracking signal that drives the motor 6 becomes minute and the drive signal falls within the dead zone of the motor. There is a problem that the track cannot be released.

発明の目的 本発明は上記従来の問題点を解消するものであシ、ロッ
クドトラックが発生した場合、ロックドトラックを解除
せしめ、ディスクと針の摩耗を防止し、安定な送シ制御
を実現することを目的とする。
OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional problems.When a locked track occurs, it releases the locked track, prevents wear of the disk and needle, and realizes stable feed control. The purpose is to

発明の構成 本発明はロックドトラックが発生したことを検出する回
路と、ロックドトラックが発生した場合ロックドトラ、
り状態を解除せしめるために、ピックアップを所望の方
向に駆動させるためパルス駆動信号を送シ駆動回路に印
加せしめる回路を備えたものである。
Structure of the Invention The present invention provides a circuit for detecting the occurrence of a locked track, and a circuit for detecting a locked track when a locked track occurs.
In order to release the stuck state, the device is equipped with a circuit that applies a pulse drive signal to the feed drive circuit in order to drive the pickup in a desired direction.

実施例の説明 第2図は本発明による一実施例を示すプロ、り図であシ
、第1図と同一符号を付したプロ、りは第1図と同様の
機能を有するものである。菓3図は第2図において本発
明によシ付加したブロックの各点での信号例を示す波形
図である。
DESCRIPTION OF THE EMBODIMENTS FIG. 2 is a diagram showing an embodiment of the present invention, and the components having the same reference numerals as those in FIG. 1 have the same functions as those in FIG. 1. FIG. 3 is a waveform diagram showing an example of a signal at each point of the block added according to the present invention in FIG.

以下、第2図、第3図を用いて本発明による実施例の説
明を行う。本発明によシ付加したブロックを第2図14
に示す。第3図aに示す低周波成分のみにしたトラッキ
ング信号とDC電圧発生器8によるiのDC電圧とをコ
ンパレータ9で電圧比較する。第3図すはコンパレータ
9の出力信号を示す。コンパレータ9の出力信号すは積
分回路10で積分され、その出力信号Cはコンパレータ
11に入力される。コンパレータ11のもう一方の入力
信号はDC電圧発生器13によシ第3図Cに示すように
Jに設定され、コンパレータ11に入力される。積分さ
れた信号がDO電電圧C上シ大きくなるとパルス発生器
12により、モーター6を駆動せしめるだけの駆動パル
スdが生成される。
Hereinafter, embodiments of the present invention will be explained using FIGS. 2 and 3. The blocks added according to the present invention are shown in FIG.
Shown below. A comparator 9 compares the tracking signal with only low frequency components shown in FIG. FIG. 3 shows the output signal of the comparator 9. The output signal C of the comparator 9 is integrated by an integrating circuit 10, and its output signal C is input to a comparator 11. The other input signal of the comparator 11 is set to J by the DC voltage generator 13 as shown in FIG. When the integrated signal becomes larger than the DO voltage C, the pulse generator 12 generates a driving pulse d sufficient to drive the motor 6.

第s 図dに示す駆動パルスはドライバ回路5に印加さ
れ、モーターeを駆動せしめる。
The drive pulse shown in FIG. s(d) is applied to the driver circuit 5 to drive the motor e.

このようにトラッキング信号が所定時間、所定電圧を越
えなければモーターにパルス駆動信号を印加する構成に
なっている。従って、ロックドトラックが生じた場合、
第3図dに示すようにトラッキング信号がa′の電圧以
下になることから、上記に示す構成によりモーターを駆
動せkめるパルス駆動信号が印加される。ピックアップ
を含む担体はモーターが駆動せしめられることによシ移
動し、ロックドトラックは解除される。上記構成は一方
向についてのみ説明したが、コンパレータの設定電位と
出力信号の極性を変え、印加するパルスの極性を切換え
ることにより、逆方向に進行中に発生する口、クドトラ
、りにおいても対処しうる。
In this way, if the tracking signal does not exceed a predetermined voltage for a predetermined period of time, a pulse drive signal is applied to the motor. Therefore, if a locked track occurs,
Since the tracking signal becomes less than the voltage a' as shown in FIG. 3d, a pulse drive signal is applied to drive the motor using the configuration shown above. The carrier including the pickup is moved by driving the motor, and the locked track is released. The above configuration has been explained only in one direction, but by changing the set potential of the comparator and the polarity of the output signal, and switching the polarity of the applied pulse, it is also possible to deal with problems that occur while traveling in the opposite direction. sell.

なお、本実施例ではコンパレータ2個と積分回路を用い
てトラッキング信号が所定時間、所定電圧を越えないこ
とを検出しているが、これをコンパレータ1個とマイク
ロコンピュータで置き換えることも可能である。その場
合、マイクロコンピュータは所定電圧をトラ、キング誤
差信号が越えないことを時間管理するために用いられる
。マイクロコンピュータを用いれば、かなシ少ない部品
点数で本発明による構成が可能である。
In this embodiment, two comparators and an integrating circuit are used to detect that the tracking signal does not exceed a predetermined voltage for a predetermined period of time, but it is also possible to replace this with one comparator and a microcomputer. In that case, the microcomputer is used to time-manage that the error signal does not exceed a predetermined voltage. If a microcomputer is used, the configuration according to the present invention can be achieved with a small number of parts.

また、モーターにパルス駆動信号を印加するかわシに、
ピックアップの駆動回路にパルス信号を印加しても上記
と同様の結果が得られることは明らかである。
In addition, when applying a pulse drive signal to the motor,
It is clear that the same results as above can be obtained by applying a pulse signal to the drive circuit of the pickup.

発明の効果 以上のように本発明によれば、低周波成分のみに変換さ
れたトラッキング信号が所定時間、所定電圧を越えない
場合、即ち、ロックドトラック等が発生し、所望の方向
にピックアップを含む担体が移動しない場合、強制的に
所望の方向に前記担体を移動せしめ得るだけのパルス信
号を前記担体を移動せしめるモーターの駆動回路に印加
することによってロックドトラックを解除することがで
き、実用上効果大なるものがある。
Effects of the Invention As described above, according to the present invention, if the tracking signal converted into only low frequency components does not exceed a predetermined voltage for a predetermined time, that is, a locked track or the like occurs, and the pickup cannot be moved in a desired direction. If the carrier containing the carrier does not move, the locked track can be released by applying a pulse signal sufficient to forcibly move the carrier in the desired direction to the drive circuit of the motor that moves the carrier. There are some things that have great benefits.

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

第1図は従来の送シ駆動制御装置のブロック図、第2図
は本発明の一実施例を示す送り駆動制御装置のブロッグ
図、第3図は第2図における各点での信号波形例を示す
図である。 8.13・・・・・・DC電圧発生器、9.11・・・
・・コンパレータ、10・・・・・・積分回路、12・
・・・パルス発生器。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第 
1 図 第2図
Fig. 1 is a block diagram of a conventional feed drive control device, Fig. 2 is a block diagram of a feed drive control device showing an embodiment of the present invention, and Fig. 3 is an example of signal waveforms at each point in Fig. 2. FIG. 8.13...DC voltage generator, 9.11...
...Comparator, 10...Integrator circuit, 12.
...Pulse generator. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 円盤状情報記録媒体上に記録された情報トラックをトラ
ッキングしながら再生する再生手段を有し、前記再生手
段を含む装置を移動せしめるだめの送り駆動装置の送シ
駆動信号に前記再生手段の位置を示す信号を用いるよう
に構成すると共に、前記位置信号が所定電圧を所1、定
時間越えない場合、前記再生手段、或いは再生手段を含
む装置を移動せしめるように構成したことを特徴とする
送り駆動制御装置。
It has a reproducing means for reproducing while tracking an information track recorded on a disk-shaped information recording medium, and the position of the reproducing means is determined by a feed drive signal of a feed drive device for moving a device including the reproducing means. The feed drive is configured to use a signal indicating a predetermined voltage, and is configured to move the reproducing means or a device including the reproducing means if the position signal does not exceed a predetermined voltage for a predetermined period of time. Control device.
JP7607284A 1984-04-16 1984-04-16 Feed drive controller Pending JPS60219681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7607284A JPS60219681A (en) 1984-04-16 1984-04-16 Feed drive controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7607284A JPS60219681A (en) 1984-04-16 1984-04-16 Feed drive controller

Publications (1)

Publication Number Publication Date
JPS60219681A true JPS60219681A (en) 1985-11-02

Family

ID=13594590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7607284A Pending JPS60219681A (en) 1984-04-16 1984-04-16 Feed drive controller

Country Status (1)

Country Link
JP (1) JPS60219681A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109166A (en) * 1980-12-26 1982-07-07 Hitachi Ltd Locked groove elimination device for video disc player
JPS58166566A (en) * 1982-03-26 1983-10-01 Sanyo Electric Co Ltd Information reproducing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109166A (en) * 1980-12-26 1982-07-07 Hitachi Ltd Locked groove elimination device for video disc player
JPS58166566A (en) * 1982-03-26 1983-10-01 Sanyo Electric Co Ltd Information reproducing device

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