JPS60191480A - Feed drive controller - Google Patents

Feed drive controller

Info

Publication number
JPS60191480A
JPS60191480A JP4751184A JP4751184A JPS60191480A JP S60191480 A JPS60191480 A JP S60191480A JP 4751184 A JP4751184 A JP 4751184A JP 4751184 A JP4751184 A JP 4751184A JP S60191480 A JPS60191480 A JP S60191480A
Authority
JP
Japan
Prior art keywords
limiter
signal
pickup
feed drive
potential
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
JP4751184A
Other languages
Japanese (ja)
Other versions
JPH0574150B2 (en
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 JP4751184A priority Critical patent/JPS60191480A/en
Publication of JPS60191480A publication Critical patent/JPS60191480A/en
Publication of JPH0574150B2 publication Critical patent/JPH0574150B2/ja
Granted 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
    • G11B21/04Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw

Landscapes

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

Abstract

PURPOSE:To stabilize feed drive control by setting a limiter potential corresponding to an advance direction and a limiter potential corresponding to its opposite direction to potentials which differ in absolute value. CONSTITUTION:Two limiters 10 and 11 are a limiter for the inward movement of each pickup from the outer periphery and a limiter for the outward movement of the pickup from the inner periphery, and limiter voltages of the limiters 10 for the front-to-rear movement and opposite-directional movement are set by DC voltage generators 8 and 9. Those voltages are converted by inverter amplifiers 13 and 14 into inverted potentials of a zero or desired potential and utilized as the limiter potential of the limiter 11. Signals to be sent to a gate circuit 4 are switched by an analog switch 12 according to a desired direction. Consequently, even if a stylus jump occurs in the advance or opposite direction to cause the disorder of a tracking signal, it is not transmitted as a driving signal to the pickup because the signal is limited by the limiters, so unnecessary operation is performed.

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再生装置における記録情報
を検出する手段を含む装置を移動せしめ−1− る送り駆動−61装置に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a feed drive 61 device for moving a device including means for detecting recorded information in a disk-shaped information recording medium reproducing device.

従来例の構成とその問題点 一般的にビデオディスクプレーヤにおいて円盤状情報記
録媒体〔以下、ディスクと称す〕上の信号を読み取るた
めのピックアップを移動せしめる送り制御には、低周波
ろ波器により低周波成分のみにしたトラッキング誤差信
号がピックアップを移動せしめる駆動信号として用いら
れる。第1図はその構成例を示し、再生された信号から
扱き取ったトラッキング誤差信号1は低周波ろ波器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
によりリミッタ幅を越える信号は制限される。これは静
電容量方式ビデオディスクプレヤの場合、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誤差信号が乱れる。このような誤差
信号をピックアップの駆動信号に用いると針飛びと同様
にピックアップが誤動作することがある。そのため、前
記リミッタ回路3によりピックアップが誤動作しないよ
うに駆動信号に制限を加えている。リミッッー 2 − 夕回路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により一定時間のみドライバ回路5に伝達
する。ゲート回路4を通過した信号はドライバ回路5に
おいてモータ6を駆動する駆動信号に変換される。本構
成では、トラッキング誤差信号の低周波成分を駆動信号
としているため、トラッキング誤差信号に応じて両方向
に駆動される。従って、例えばピックアップを外周から
内周側方向に移動せしめて配録された信号を再生する場
合、ディスク上のホコリ、傷等で針飛びが外周方向に針
飛びが生じた場合、リミッタ回路3により電圧制限は受
けるが、ピックアップも外周方向に移動せしめられるこ
とになる。このように、ピックアップの送り駆動制御に
トラッキング誤差信号を用いた場合には回路構成は簡単
であるが、ピックアップを不必要に駆動せしめることが
あるのが現状である。
Conventional configuration and its problems In general, in a video disc player, a low frequency filter is used to control the feed of a pickup for reading signals on a disc-shaped information recording medium (hereinafter referred to as a disc). A tracking error signal containing only frequency components is used as a drive signal to move the pickup. FIG. 1 shows an example of its configuration, in which a tracking error signal 1 handled from a reproduced signal is converted into a signal containing only low frequency components by a low frequency filter 2, and a limiter circuit 3
Therefore, signals exceeding the limiter width are limited. In the case of a capacitive video disc player, if dirt, dust, etc. adhere to the disc, stylus jump occurs, which disturbs the tracking error signal. If such an error signal is used as a drive signal for the pickup, the pickup may malfunction as in the case of needle skipping. Therefore, the drive signal is limited by the limiter circuit 3 to prevent the pickup from malfunctioning. The signal that has passed through the limit circuit 3 is transmitted to the driver circuit 5 only for a certain period of time by the gate signal 7 in the next stage gate circuit 4. The signal passing through the gate circuit 4 is converted into a drive signal for driving the motor 6 in the driver circuit 5 . In this configuration, since the low frequency component of the tracking error signal is used as the drive signal, it is driven in both directions according to the tracking error signal. Therefore, for example, when reproducing a recorded signal by moving the pickup from the outer circumference to the inner circumference, if the needle skips in the outer circumference direction due to dust or scratches on the disk, the limiter circuit 3 Although the voltage is limited, the pickup is also moved in the outer circumferential direction. In this way, when the tracking error signal is used to control the feed drive of the pickup, the circuit configuration is simple, but the current situation is that the pickup may be driven unnecessarily.

発明の目的 本発明は駆動制御信号にトラッキング誤差信号を用いる
際に問題となった針飛び等よって生ずる− 3 − ピックアップの不必要な動作を除去することができる送
り駆動制御装置を提供することを目的とする。
OBJECTS OF THE INVENTION It is an object of the present invention to provide a feed drive control device that can eliminate unnecessary movements of a pickup caused by needle skipping, etc., which are problems when using a tracking error signal as a drive control signal. purpose.

発明の構成 本発明の送り駆動装置は、円盤状情報記録媒体から読み
出した再生信号からトラッキング誤差信号を抜き取り、
このトラッキング誤差信号を低周波ろ波器に入力してそ
の低周波信号成分を抽出し、この抽出された信号を送り
駆動信号として前記円盤状記録媒体から記録された情報
を検出する手段を含む装置を移動せしめるよう構成し、
かつ信号経路にリミッタ手段を設けると共にこのリミッ
タ手段の進行方向に対応するリミッタ電位とその逆方向
に対応するリミッタ電位を絶対値の異なる電位に設定し
て送り駆動信号をリミットしたことを特徴とする。
Structure of the Invention The feed drive device of the present invention extracts a tracking error signal from a reproduction signal read from a disc-shaped information recording medium,
An apparatus including means for inputting this tracking error signal into a low frequency filter to extract its low frequency signal component, and detecting information recorded from the disk-shaped recording medium by sending the extracted signal as a drive signal. configured to move the
Further, a limiter means is provided in the signal path, and a limiter potential corresponding to the advancing direction of the limiter means and a limiter potential corresponding to the opposite direction thereof are set to potentials having different absolute values to limit the sending drive signal. .

実施例の説明 以下、本発明の一実施例を第2図と第3@に基づいて説
明する。第2図は本発明による送り駆動制御装置を示す
。第2図において第1図と同一の− 4 − 符号で示すブロックは第1図と同様の機能を有するもの
であり、本実施例の特徴は第1図におけリミッタ回路3
を改良した点にある。この第2図をもとに本発明の実施
例について説明する。従来のリミッタ回路3に比べ、第
2図では、リミッタ10.11と、インバータアンプ1
3.14と、アナログスイッチ12の構成からなってい
る。2つのリミッタ io、1iは各々ピックアップが
外周から内周方向へ移動する場合〔以下、F方向とする
〕におけるリミッタとピックアップが内周から外周方向
へ移動する場合〔以下、R方向とする〕におけるリミッ
タであり、リミッタ10の前後方向とその逆方向のリミ
ッタ電圧は各々DC電圧発生器8,9により設定されて
いる。また、この電圧はインバータアンプ13.14に
よりO電位或いは所望の電位に対して反転した電位に変
換され、リミッタ11のリミッタ電位に利用されている
。所望の方向によりアナログスイッチ12でゲート回路
4へ送る信号を切換える。
DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 shows a feed drive control device according to the invention. In FIG. 2, blocks indicated by the same symbols -4- as in FIG. 1 have the same functions as in FIG. 1, and the feature of this embodiment is that the limiter circuit 3 in FIG.
The point is that we have improved the . An embodiment of the present invention will be described based on FIG. 2. Compared to the conventional limiter circuit 3, in Fig. 2, the limiter 10.11 and the inverter amplifier 1
3.14 and an analog switch 12. The two limiters io and 1i are the limiter when the pickup moves from the outer circumference to the inner circumference [hereinafter referred to as the F direction] and the limiter when the pickup moves from the inner circumference to the outer circumference direction [hereinafter referred to as the R direction]. The limiter 10 is a limiter, and limiter voltages in the forward and backward directions and in the opposite direction of the limiter 10 are set by DC voltage generators 8 and 9, respectively. Further, this voltage is converted by inverter amplifiers 13 and 14 to an O potential or a potential inverted from a desired potential, and is used as the limiter potential of the limiter 11. The analog switch 12 switches the signal sent to the gate circuit 4 depending on the desired direction.

第3図は具体的な信号波形例とリミッタ10.11− 
5 − による電圧制限例を示す。aはF方向にピックアップを
移動せしめる場合を示し、bはR方向にピックアップを
移動せしめる場合を示す。Is、16は各々F方向送り
駆動制御信号、R方向送り駆動制御信号である。Vlは
前進方向を制約するリミッタ電圧、−V2は後進方向を
制約するリミッタ電圧を示し、R方向にピックアップを
移動せしめる場合には、このVl、−V2の電位をイン
バータアンプ13.14により−V1.V2に反転し、
その電圧をリミッタ電圧として用いる。従来構成ではV
l =V2であったが本発明ではV1≠V2ある点に特
徴がある。
Figure 3 shows a specific signal waveform example and limiter 10.11-
5 - An example of voltage limitation is shown below. A indicates a case in which the pickup is moved in the F direction, and b indicates a case in which the pickup is moved in the R direction. Is and 16 are an F direction feed drive control signal and an R direction feed drive control signal, respectively. Vl is a limiter voltage that restricts the forward direction, and -V2 is a limiter voltage that restricts the backward direction. When moving the pickup in the R direction, the potentials of Vl and -V2 are changed to -V1 by an inverter amplifier 13.14. .. Reverse to V2,
This voltage is used as the limiter voltage. In the conventional configuration, V
l=V2, but the present invention is characterized in that V1≠V2.

このように本実施例ではピックアップが内周方向に進む
場合と外周方向に進む場合と異なるリミッタでピックア
ップの送り駆動制御信号に用いるトラッキング誤差信号
を制限するように構成されている。従って、進行方向に
対して逆方向に針飛びが生じてトラッキング信号が乱れ
ても、ピックアップにはリミッタで前記信号を制限する
ため、駆動信号として伝わらず、従来のような不必要な
−6− 動作が起きることはない。
In this way, this embodiment is configured to limit the tracking error signal used as the pickup feed drive control signal using different limiters when the pickup moves toward the inner circumference and when it moves toward the outer circumference. Therefore, even if a needle jump occurs in the opposite direction to the traveling direction and the tracking signal is disturbed, the signal is limited by a limiter in the pickup, so it is not transmitted as a drive signal, and unnecessary -6- No action occurs.

発明の詳細 な説明のように本発明の送り駆動制御装置によると、リ
ミッタ手段のリミッタ電位を、進行方向に対応するリミ
ッタ電位とその逆方向に対応するリミッタ電位を絶対値
の異なる電位に設定して、リミットするよう構成したた
め、従来構成では針飛びによってピックアップが不必要
に動作していたが、本発明によれば不必要なピックアッ
プの動作は除去され、安定な送り馴初制御を実現できる
ものである。
As described in the detailed description of the invention, according to the feed drive control device of the present invention, the limiter potential of the limiter means is set to a potential that has a different absolute value between a limiter potential corresponding to the advancing direction and a limiter potential corresponding to the opposite direction. In the conventional configuration, the pickup operated unnecessarily due to needle skipping, but according to the present invention, unnecessary pickup operation is eliminated and stable feed start control can be realized. It is.

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

第1図は従来の送り駆動!1 till装置のブロック
図、第2図は本発明の一実施例における送り駆動制御装
置のブロック図、第3図は第2図の要部波形図である。 1・・・トラッキング誤差信号、2・・・低周波ろ波器
、4・・・グー1〜回路、5・・・ドライバ回路、6・
・・モータ、8.9・・・DC電圧発生器、10.11
・・・リミッタ、12・・・アナログスイッチ、13.
14・・・インバータアンプ、−7−
Figure 1 shows the conventional feed drive! 1 is a block diagram of a till device, FIG. 2 is a block diagram of a feed drive control device in an embodiment of the present invention, and FIG. 3 is a waveform diagram of the main part of FIG. DESCRIPTION OF SYMBOLS 1... Tracking error signal, 2... Low frequency filter, 4... Goo 1~ circuit, 5... Driver circuit, 6...
...Motor, 8.9...DC voltage generator, 10.11
... Limiter, 12... Analog switch, 13.
14... Inverter amplifier, -7-

Claims (1)

【特許請求の範囲】[Claims] 1、円盤状情報記録媒体から読み出した再生信号からト
ラッキング誤差信号を抜き取り、このトラッキング誤差
信号を低周波ろ波器に入力してその低周波信号成分を抽
出し、この抽出された信号を送り駆動信号として前記円
盤状情報記録媒体から記録された情報を検出する手段を
含む装置を移動せしめるよう構成し、かつ信号経路にリ
ミッタ手段を設けると共にこのリミッタ手段の進行方向
に対応するリミッタ電位とその逆方向に対応するリミッ
タ電位を絶対値の異なる電位に設定して送り駆動信号を
リミットした送り駆動制御装置。
1. Extract the tracking error signal from the reproduced signal read from the disk-shaped information recording medium, input this tracking error signal to a low frequency filter to extract the low frequency signal component, and send this extracted signal to drive. The device is configured to move a device including means for detecting information recorded from the disk-shaped information recording medium as a signal, and is provided with a limiter means in the signal path, and has a limiter potential corresponding to the traveling direction of the limiter means and vice versa. A feed drive control device that limits the feed drive signal by setting limiter potentials corresponding to directions to potentials with different absolute values.
JP4751184A 1984-03-12 1984-03-12 Feed drive controller Granted JPS60191480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4751184A JPS60191480A (en) 1984-03-12 1984-03-12 Feed drive controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4751184A JPS60191480A (en) 1984-03-12 1984-03-12 Feed drive controller

Publications (2)

Publication Number Publication Date
JPS60191480A true JPS60191480A (en) 1985-09-28
JPH0574150B2 JPH0574150B2 (en) 1993-10-15

Family

ID=12777130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4751184A Granted JPS60191480A (en) 1984-03-12 1984-03-12 Feed drive controller

Country Status (1)

Country Link
JP (1) JPS60191480A (en)

Also Published As

Publication number Publication date
JPH0574150B2 (en) 1993-10-15

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