JPS58122238U - Tracking servo device in recorded information reading device - Google Patents
Tracking servo device in recorded information reading deviceInfo
- Publication number
- JPS58122238U JPS58122238U JP1626982U JP1626982U JPS58122238U JP S58122238 U JPS58122238 U JP S58122238U JP 1626982 U JP1626982 U JP 1626982U JP 1626982 U JP1626982 U JP 1626982U JP S58122238 U JPS58122238 U JP S58122238U
- Authority
- JP
- Japan
- Prior art keywords
- outputs
- added
- tracking servo
- information reading
- recorded information
- 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
Landscapes
- 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図はプッシュプル法はよる従来例を示すブロック図
、第２図はヘテロゲイン検波法による従来例を示すブロ
ック図、第３図ｉ土本考案による一実施例を示すブロッ
ク図である。
主要部分の符号の説明、１・・・・・・フォトディテク
タ、４，９．１３・・・・・・差動増幅器、５・・・・
・・駆動回路、１０．１１・・・・・・サンプルホール
ド回路、１２・・・・・・サンフルパルスｉ生器、１５
・・間ドロップアウト検出回路、１６・・・・・・スイ
ッチ手段。FIG. 1 is a block diagram showing a conventional example using the push-pull method, FIG. 2 is a block diagram showing a conventional example using the hetero gain detection method, and FIG. 3 is a block diagram showing an embodiment proposed by Tsuchimoto. Explanation of symbols of main parts, 1...Photodetector, 4,9.13...Differential amplifier, 5...
... Drive circuit, 10.11 ... Sample hold circuit, 12 ... Sunful pulse i generator, 15
. . . dropout detection circuit, 16 . . . switch means.
Claims (2)
レメントの出力を加算して１対の加算出力を導出しこの
１対の加算出力の差信号をトラッキングエラー信号とす
る第１の検出手段と、前記受光手段の対角線上のエレメ
ントの出力を加算して１対の加算出力を導出しこの１対
の加算出力の差信号と再生情報信号との位相差信号を、
トラッキングエラー信号とする第２の検出手牌
とを備え、前記第１及び第２の検出手段からの各トラッ
キングエラー信号に基づいてトラッキングサーボを行な
うようにしたことを特徴とする記録情報読取装置におけ
るトラッキングサーボ装置。(1) First detection in which the outputs of the four-divided light receiving means and the adjacent elements of the light receiving means are added to derive a pair of added outputs, and the difference signal between the pair of added outputs is used as a tracking error signal. and the outputs of the elements on the diagonal of the light receiving means are added to derive a pair of added outputs, and a phase difference signal between the difference signal of the pair of added outputs and the reproduced information signal,
A recorded information reading device comprising: a second detection hand tile serving as a tracking error signal; and tracking servo is performed based on each tracking error signal from the first and second detection means. Tracking servo device.
ドロップアウト検出手段を有し、このドロップアウト検
出手段の出力に基づいて選択的にトラッキングエラー信
号を出力することを特徴とする実用新案登録請求の範囲
第１項記載の記録情報読取装置におけるトラッキングサ
ーボ装置。(2) Utility model registration characterized in that the second detection means has a dropout detection means for detecting dropout, and selectively outputs a tracking error signal based on the output of the dropout detection means. A tracking servo device in a recorded information reading device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1626982U JPS58122238U (en) | 1982-02-08 | 1982-02-08 | Tracking servo device in recorded information reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1626982U JPS58122238U (en) | 1982-02-08 | 1982-02-08 | Tracking servo device in recorded information reading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58122238U true JPS58122238U (en) | 1983-08-19 |
Family
ID=30028646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1626982U Pending JPS58122238U (en) | 1982-02-08 | 1982-02-08 | Tracking servo device in recorded information reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58122238U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6292185A (en) * | 1985-10-17 | 1987-04-27 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62110631A (en) * | 1985-11-08 | 1987-05-21 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62112236A (en) * | 1985-11-12 | 1987-05-23 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62239331A (en) * | 1986-04-09 | 1987-10-20 | Seiko Instr & Electronics Ltd | Optical head controller |
-
1982
- 1982-02-08 JP JP1626982U patent/JPS58122238U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6292185A (en) * | 1985-10-17 | 1987-04-27 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62110631A (en) * | 1985-11-08 | 1987-05-21 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62112236A (en) * | 1985-11-12 | 1987-05-23 | Seiko Instr & Electronics Ltd | Tracking error signal generating circuit |
| JPS62239331A (en) * | 1986-04-09 | 1987-10-20 | Seiko Instr & Electronics Ltd | Optical head controller |
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