JPH0574150B2 - - Google Patents
Info
- Publication number
- JPH0574150B2 JPH0574150B2 JP4751184A JP4751184A JPH0574150B2 JP H0574150 B2 JPH0574150 B2 JP H0574150B2 JP 4751184 A JP4751184 A JP 4751184A JP 4751184 A JP4751184 A JP 4751184A JP H0574150 B2 JPH0574150 B2 JP H0574150B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- limiter
- drive control
- potential corresponding
- tracking error
- 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.)
- Expired - Lifetime
Links
- 239000000284 extract Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/04—Automatic 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)
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
る送り駆動制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a feed drive control device for moving a device including means for detecting recorded information in a disc-shaped information recording medium reproducing device.
従来例の構成とその問題点
一般的にビデオデイスクプレーヤにおいて円盤
状情報記録媒体〔以下、デイスクと称す〕上の信
号を読み取るためのピツクアツプを移動せしめる
送り制御には、低周波ろ波器により低周波成分の
みにしたトラツキング誤差信号がピツクアツプを
移動せしめる駆動制御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抜
き取つたトラツキング誤差信号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
ツタ回路３によりリミツ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イスクプレ
ヤの場合、デイスク上にゴミ、ホコリ等が付着し
ていると針飛びが生じ、それによつてトラツキン
グ誤差信号が乱れる。このような誤差信号をピツ
クアツプの駆動制御信号に用いると針飛びと同様
にピツクアツプが誤動作することがある。そのた
め、前記リミツタ回路３によりピツクアツプが誤
動作しないように駆動制御信号に制限を加えてい
る。リミツツタ回路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、
トラツ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、トラツキング誤差信号に応じて両
方向に駆動される。従つて、例えばピツクアツプ
を外周から内周側方向に移動せしめて記録された
信号を再生する場合、デイスク上のホコリ、傷等
で外周方向に針飛びが生じた場合、リミツタ回路
３により電圧制限は受けるが、ピツクアツプも外
周方向に移動せしめることになる。このように、
ピツクアツプの送り駆動制御にトラツキング誤差
信号を用いた場合には回路構成は簡単であるが、
ピツクアツ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 movement of the pick-up for reading signals on a disk-shaped information recording medium (hereinafter referred to as a disk). A tracking error signal containing only frequency components is used as a drive control signal for moving the pickup. FIG. 1 shows an example of its configuration. A tracking error signal 1 extracted from the reproduced signal is converted into a signal containing only low frequency components by a low frequency filter 2, and a limiter circuit 3 removes signals exceeding the limiter width. limited. In the case of a capacitive video disc player, if dirt, dust, etc. adhere to the disc, needle skipping occurs, which disturbs the tracking error signal. If such an error signal is used as a pickup drive control signal, the pickup may malfunction in the same way as needle skipping. Therefore, the limiter circuit 3 limits the drive control signal to prevent the pickup from malfunctioning. The signal that has passed through the limiter 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 sent to the motor 6 in the driver circuit 5.
is converted into a drive signal that drives the 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 jumps toward the outer circumference due to dust or scratches on the disk, the limiter circuit 3 will limit the voltage. However, the pick-up is also moved toward the outer circumference. in this way,
If a tracking error signal is used to control the pickup feed drive, 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ツキング誤差信号
を用いる際に問題となつた針飛び等よつて生ずる
ピツクアツ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。Purpose of the Invention An object of the present invention is to provide a feed drive control device that can eliminate unnecessary pick-up operations caused by needle skipping, etc., which are problems when using a tracking error signal as a drive control signal. do.
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ツキング誤差信
号を抜き取り、このトラツ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制御信号とし
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ツタ手段を設けると共にこ
の、前記装置の進行方向に対応するリミツト電位
と逆方向に対応するリミツト電位を有するリミツ
タ手段を設けると共に、この逆方向に対応するリ
ミツタ電位を進行方向に対応するリミツタ電位よ
り絶対値の小さい電位に設定して送り駆動制御信
号をリミツ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 reproduced signal read from a disk-shaped information recording medium, inputs this tracking error signal to a low frequency filter, and extracts the low frequency signal component. , configured to use the extracted signal as a drive control signal to move a device including means for detecting information recorded from the disk-shaped recording medium;
Further, a limiter means is provided in the signal path, and a limiter means having a limit potential corresponding to a direction opposite to the limit potential corresponding to the traveling direction of the device is provided, and the limiter potential corresponding to the opposite direction is set to correspond to the traveling direction. The present invention is characterized in that the feed drive control signal is limited by setting the potential to be smaller in absolute value than the limiter potential.
実施例の説明
以下、本発明の一実施例を第２図と第３図に基
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
符号で示すブロツクは第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
ミツタ回路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
リミツタ回路３に比べ、第２図では、リミツタ１
０，１１と、インバータアンプ１３，１４と、ア
ナログスイツチ１２の構成からなつている。２つ
のリミツタ１０，１１は各々ピツクアツプが外周
から内周方向へ移動する場合〔以下、Ｆ方向とす
る〕におけるリミツタとピツクアツプが内周から
外周方向へ移動する場合〔以下、Ｒ方向とする〕
におけるリミツタあでり、リミツタ１０の前後方
向とその逆方向のリミツタ電圧は各々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０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、リミツタ１１のリミツ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ツチ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 designated by the same reference numerals 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. 1 is improved. An embodiment of the present invention will be described based on FIG. 2. Compared to the conventional limiter circuit 3, limiter 1 in FIG.
0 and 11, inverter amplifiers 13 and 14, and an analog switch 12. The two limiters 10 and 11 are the same when the pick-up moves from the outer circumference to the inner circumference (hereinafter referred to as the F direction) and when the pick-up moves from the inner circumference to the outer circumference (hereinafter referred to as the R direction).
The limiter voltage in the forward and backward directions of the limiter 10 and the limiter voltage in the opposite direction are set by DC voltage generators 8 and 9, respectively. Further, this voltage is converted by inverter amplifiers 13 and 14 into a potential that is inverted from a zero potential or 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ツタ１０，
１１による電圧制限例を示す。ａはＦ方向にピツ
クアツプを移動せしめる場合を示し、ｂはＲ方向
にピツクアツプを移動せしめる場合を示す。１
５，１６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。V1は前進方向を制約
するリミツタ電圧、−V2は後進方向を制約するリ
ミツタ電圧を示し、Ｒ方向にピツクアツプを移動
せしめる場合には、このV1，−V2の電位をインバ
ータアンプ１３，１４により−V1，V2に反転し、
その電圧をリミツタ電圧として用いる。従来構成
ではV1＝V2であつたが本発明ではV1＞V2、もし
くはV1≫V2である点に特徴がある。なお、本実
施例では、０ボルトを基準としているが、これに
限るものではなく、たとえば単電源での構成の場
合その略中位点を基準としても同様の構成で実施
できることはいうまでもない。 FIG. 3 shows a specific example of the signal waveform and the limiter 10,
An example of voltage restriction according to No. 11 is shown below. A shows the case where the pick-up is moved in the F direction, and b shows the case where the pick-up is moved in the R direction. 1
5 and 16 are an F direction feed drive control signal and an R direction feed drive control signal, respectively. V 1 indicates a limiter voltage that limits the forward direction, and -V 2 indicates a limiter voltage that limits the backward direction. When moving the pickup in the R direction, the potentials of V 1 and -V 2 are transferred to the inverter amplifier 13, 14, it is inverted to −V 1 and V 2 ,
This voltage is used as the limiter voltage. In the conventional configuration, V 1 =V 2 , but the present invention is characterized in that V 1 >V 2 or V 1 >> V 2 . In this embodiment, 0 volt is used as the reference, but this is not the only option. For example, in the case of a configuration with a single power supply, it goes without saying that the same configuration can be implemented using the approximately midpoint as the reference. .
このように本実施例ではピツクアツプが内周方
向に進む場合と外周方向に進む場合と異なるリミ
ツタでピツクアツプの送り駆動制御信号に用いる
トラツキング誤差信号を制限するように構成され
ている。従つて、進行方向に対して逆方向に針飛
びが生じてトラツキング信号が乱れても、ピツク
アツプにはリミツタで前記信号を制限するため、
送り駆動制御信号として伝わらず、従来のような
不必要な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 the tracking signal is disturbed due to needle skipping in the opposite direction to the direction of movement, the signal is limited by the pick-up limiter.
It is not transmitted as a feed drive control signal, and unnecessary operations will not occur as in the conventional case.
発明の効果
以上説明のように本発明の送り駆動制御装置に
よると、リミツタ手段の逆方向に対応するリミツ
タ電位を進行方向に対応するリミツタ電位より絶
対値の小さい電位に設定して、リミツトするよう
構成したため、従来構成では針飛びによつてピツ
クアツプが不必要に動作していたが、本発明によ
れば不必要なピツクアツプの動作は除去され、安
定な送り駆動制御を実現できるものである。Effects of the Invention As explained above, according to the feed drive control device of the present invention, the limiter potential corresponding to the opposite direction of the limiter means is set to a potential smaller in absolute value than the limiter potential corresponding to the advancing direction, and the limiting is performed. Therefore, in the conventional structure, the pick-up operated unnecessarily due to needle skipping, but according to the present invention, unnecessary pick-up operations are eliminated, and stable feed drive control can be realized.
第１図は従来の送り駆動制御装置のブロツク
図、第２図は本発明の一実施例における送り駆動
制御装置のブロツク図、第３図は第２図の要部波
形図である。
１……トラツキング誤差信号、２……低周波ろ
波器、４……ゲート回路、５……ドライバ回路、
６……モータ、８，９……DC電圧発生器、１０，
１１……リミツタ、１２……アナログスイツチ、
１３，１４……インバータアンプ。
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 according to an embodiment of the present invention, and FIG. 3 is a waveform diagram of the main part of FIG. 1... Tracking error signal, 2... Low frequency filter, 4... Gate circuit, 5... Driver circuit,
6... Motor, 8, 9... DC voltage generator, 10,
11... Limiter, 12... Analog switch,
13, 14...Inverter amplifier.
Claims (1)
からトラツキング誤差信号を抜き取り、このトラ
ツ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
送り駆動制御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、前記
装置の進行方向に対応するリミツト電位と逆方向
に対応するリミツト電位を有するリミツタ手段を
設けると共に、この逆方向に対応するリミツタ電
位を進行方向に対応するリミツタ電位より絶対値
の小さい電位に設定して送り駆動制御信号をリミ
ツ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 control the drive A device configured to move a device including means for detecting information recorded from the disk-shaped information recording medium as a signal, and a limit potential corresponding to a direction opposite to a limit potential corresponding to a direction in which the device moves in a signal path. A feed drive control device which is provided with a limiter means having a limiter means and limits a feed drive control signal by setting the limiter potential corresponding to the opposite direction to a potential smaller in absolute value than the limiter potential corresponding to the advancing direction.
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 JPS60191480A (en) | 1985-09-28 |
| JPH0574150B2 true 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) |
-
1984
- 1984-03-12 JP JP4751184A patent/JPS60191480A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60191480A (en) | 1985-09-28 |
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