DE68912867T2 - Servoeinrichtung für Plattenspieler. - Google Patents
Servoeinrichtung für Plattenspieler.Info
- Publication number
- DE68912867T2 DE68912867T2 DE68912867T DE68912867T DE68912867T2 DE 68912867 T2 DE68912867 T2 DE 68912867T2 DE 68912867 T DE68912867 T DE 68912867T DE 68912867 T DE68912867 T DE 68912867T DE 68912867 T2 DE68912867 T2 DE 68912867T2
- Authority
- DE
- Germany
- Prior art keywords
- servo device
- record players
- players
- record
- servo
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63251223A JPH0782721B2 (ja) | 1988-10-05 | 1988-10-05 | ディスクプレーヤのサーボ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68912867D1 DE68912867D1 (de) | 1994-03-17 |
DE68912867T2 true DE68912867T2 (de) | 1994-08-11 |
Family
ID=17219537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68912867T Expired - Fee Related DE68912867T2 (de) | 1988-10-05 | 1989-07-12 | Servoeinrichtung für Plattenspieler. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5050149A (de) |
EP (1) | EP0362987B1 (de) |
JP (1) | JPH0782721B2 (de) |
DE (1) | DE68912867T2 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0348308A (ja) * | 1989-03-28 | 1991-03-01 | Canon Inc | デジタルサーボ制御装置 |
DE69020624T2 (de) * | 1989-04-21 | 1995-12-21 | Nec Corp | Signalwiedergabegerät für optische Aufzeichnungs- und Wiedergabeapparatur und Methode für dasselbe. |
JPH03203871A (ja) * | 1989-12-29 | 1991-09-05 | Nec Ibaraki Ltd | 磁気ディスク装置 |
JPH0828062B2 (ja) * | 1990-04-13 | 1996-03-21 | パイオニア株式会社 | 情報再生装置 |
JP3072767B2 (ja) * | 1990-07-24 | 2000-08-07 | パイオニア株式会社 | 光学式ディスクプレーヤ |
US5142516A (en) * | 1990-09-28 | 1992-08-25 | International Business Machines Corporation | Anti-skating control of a positioning servo system |
KR100272118B1 (ko) * | 1991-11-06 | 2000-11-15 | 이데이 노부유끼 | 디지탈 서보 제어 회로를 구비한 광디스크 플레이어 및 트래킹 서보 회로 |
US5347502A (en) * | 1991-11-08 | 1994-09-13 | Matsushita Electric Industrial Co., Ltd. | Focusing control system for use in an information recording and reproducing apparatus |
JPH05189790A (ja) * | 1992-01-14 | 1993-07-30 | Matsushita Electric Ind Co Ltd | 光ピックアップ装置 |
JPH0652556A (ja) * | 1992-07-29 | 1994-02-25 | Mitsumi Electric Co Ltd | 光ディスク装置のピックアップ駆動方式 |
DE4323067A1 (de) * | 1993-07-10 | 1995-01-12 | Thomson Brandt Gmbh | G-Faktor-Abgleich |
US5436880A (en) * | 1994-01-10 | 1995-07-25 | Eastman Kodak Company | Laser power control in an optical recording system using partial correction of reflected signal error |
JPH11149731A (ja) * | 1997-11-14 | 1999-06-02 | Toshiba Microelectronics Corp | ディスク再生装置及びトラッキングサーボ回路 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0095766B1 (de) * | 1982-05-31 | 1986-10-22 | Hitachi, Ltd. | Servoschaltung für ein Gerät zur Wiedergabe von Signalen |
JP2565485B2 (ja) * | 1984-09-14 | 1996-12-18 | オリンパス光学工業株式会社 | 光学的記録再生装置 |
JPS61126637A (ja) * | 1984-11-21 | 1986-06-14 | Olympus Optical Co Ltd | 光学的情報記録再生装置 |
US4701603A (en) * | 1985-10-17 | 1987-10-20 | Optical Disc Corporation | Focus control system for optical information recorder or player |
EP0247829A1 (de) * | 1986-05-26 | 1987-12-02 | Pioneer Electronic Corporation | Verfahren und Vorrichtung zur Korrektur der Schleifenverstärkung einer feineinstellbaren Servoschleife |
JPH0679420B2 (ja) * | 1986-06-06 | 1994-10-05 | パイオニア株式会社 | トラツキングサ−ボ装置 |
-
1988
- 1988-10-05 JP JP63251223A patent/JPH0782721B2/ja not_active Expired - Fee Related
-
1989
- 1989-07-12 EP EP89307065A patent/EP0362987B1/de not_active Expired - Lifetime
- 1989-07-12 DE DE68912867T patent/DE68912867T2/de not_active Expired - Fee Related
- 1989-07-12 US US07/378,937 patent/US5050149A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0782721B2 (ja) | 1995-09-06 |
US5050149A (en) | 1991-09-17 |
JPH0298881A (ja) | 1990-04-11 |
DE68912867D1 (de) | 1994-03-17 |
EP0362987A3 (en) | 1990-12-12 |
EP0362987A2 (de) | 1990-04-11 |
EP0362987B1 (de) | 1994-02-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8365 | Fully valid after opposition proceedings | ||
8339 | Ceased/non-payment of the annual fee |