JPS58159643U - information reproducing device - Google Patents
information reproducing deviceInfo
- Publication number
- JPS58159643U JPS58159643U JP5636182U JP5636182U JPS58159643U JP S58159643 U JPS58159643 U JP S58159643U JP 5636182 U JP5636182 U JP 5636182U JP 5636182 U JP5636182 U JP 5636182U JP S58159643 U JPS58159643 U JP S58159643U
- Authority
- JP
- Japan
- Prior art keywords
- reproducing device
- information reproducing
- servo circuit
- cutoff frequency
- switching
- 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
Links
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (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
第１図はＲＦ信号検出の説明に供する図、第２図ａは従
来の情報再生装置におけるＲＦ信号／論理レベル変換手
段の構成を示すブロック図、第２図ｂ〜ｆおよび第３図
は第２図ａの作用の説明に供する波形図、第４図は本考
案の一実施例の情報再生装置におけるＲＦ信号／論理レ
ベル変換手段の構成を示すブロック図、第５図は本考案
の一実施例の作用の説明に供する波形図、第６図〜第９
図は本考案の一実施例におけるＲＦ信号／論理レベル変
換手段の第１〜第４の変形実施例を示すブロック図であ
る。
５．５１および５−２・・・・・・比較器、８および９
・・・・・・第１のおよび第２の交流結合回路、１０・
・・・・・スイッチ回路。
第１図
１〜７４
＋Ｓ、′
ｆトラククを剃１−ラ肩シＥ＆
第８図
第９図FIG. 1 is a diagram for explaining RF signal detection, FIG. 2a is a block diagram showing the configuration of RF signal/logic level conversion means in a conventional information reproducing device, and FIGS. FIG. 2 is a waveform diagram for explaining the operation of FIG. 4. FIG. 4 is a block diagram showing the configuration of the RF signal/logic level conversion means in an information reproducing apparatus according to an embodiment of the present invention. FIG. 5 is a diagram showing an embodiment of the present invention. Waveform diagrams for explaining the effects of examples, Figures 6 to 9
The figure is a block diagram showing first to fourth modified embodiments of the RF signal/logic level conversion means in one embodiment of the present invention. 5.51 and 5-2... Comparators, 8 and 9
. . . first and second AC coupling circuits, 10.
...Switch circuit. Figure 1 1-74 + S, ' f Shave the tract 1-Ra Shoulder E & Figure 8 Figure 9
Claims (4)
したＲＦ倍信号論理レベルに変換する変換手段を有し、
該変換手段の出力をトラッキングエラー信号検出に使用
をする情報再生装置において、前記変換手段の入力段を
形成し、低域成分を遮断し、高域成分を通過させる交流
結合回路の遮断周波数がトラッキングサーボ回路のオー
プン時においては、クローズ時より高くなるように切換
える手段を設けたことを特徴とする情報再生装置。(1) It has a conversion means for converting into an RF multiplied signal logic level detected from an information recording disk via a pickup,
In an information reproducing device that uses the output of the converting means to detect a tracking error signal, the cutoff frequency of an AC coupling circuit that forms an input stage of the converting means and cuts off low-frequency components and passes high-frequency components is tracked. An information reproducing device comprising means for switching the servo circuit so that when the servo circuit is open, the height is higher than when the servo circuit is closed.
換えることにより変化されることを特徴とする前記実用
新案登録請求の範囲第１項記載の情報再生装置。(2) The information reproducing device according to claim 1, wherein the cutoff frequency is changed by switching the AC coupling circuit.
各々入力とする複数の前記変換手段の出力を切り換える
ことにより変化されることを特徴とする前記実用新案登
録請求の範囲第１項記載の情報再生装置。(3) The cutoff frequency is changed by switching the outputs of a plurality of converting means each receiving the outputs of a plurality of AC coupling circuits as inputs, as described in claim 1 of the utility model registration claim. information reproducing device.
がオープンしている場合は路数１０ＫＨｚで−あり、ク
ローズしている場合は路数１００ＫＨｚであることを特
徴とする前記実用新案登録請求の範囲第１項又は第２項
記載の情報再生装置。(4) The cutoff frequency is 10 KHz when the tracking servo circuit is open, and 100 KHz when the tracking servo circuit is closed. The information reproducing device according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636182U JPS58159643U (en) | 1982-04-20 | 1982-04-20 | information reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636182U JPS58159643U (en) | 1982-04-20 | 1982-04-20 | information reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58159643U true JPS58159643U (en) | 1983-10-24 |
| JPS6319942Y2 JPS6319942Y2 (en) | 1988-06-03 |
Family
ID=30066891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5636182U Granted JPS58159643U (en) | 1982-04-20 | 1982-04-20 | information reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58159643U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01253832A (en) * | 1988-03-31 | 1989-10-11 | Matsushita Electric Ind Co Ltd | Tracking controller |
-
1982
- 1982-04-20 JP JP5636182U patent/JPS58159643U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01253832A (en) * | 1988-03-31 | 1989-10-11 | Matsushita Electric Ind Co Ltd | Tracking controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6319942Y2 (en) | 1988-06-03 |
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