JPS6431507U - - Google Patents
Info
- Publication number
- JPS6431507U JPS6431507U JP12435487U JP12435487U JPS6431507U JP S6431507 U JPS6431507 U JP S6431507U JP 12435487 U JP12435487 U JP 12435487U JP 12435487 U JP12435487 U JP 12435487U JP S6431507 U JPS6431507 U JP S6431507U
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- seek operation
- optical disk
- coarse
- fine
- 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
- 230000003287 optical effect Effects 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図はその動作の説明に供する特性曲線図、第
３図は従来の微アクチユエータの駆動電圧及び微
アクチユエータの変位の関係を示す特性曲線図で
ある。
１…トラツキングサーボ回路、２，９…位相補
償回路、３，４，１０…スイツチ回路、５…演算
増幅回路、６，１１…駆動回路、７…微アクチユ
エータ、１２…粗アクチユエータ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a characteristic curve diagram for explaining its operation, and FIG. 3 is a characteristic curve diagram showing the relationship between the drive voltage of a conventional fine actuator and the displacement of the fine actuator. DESCRIPTION OF SYMBOLS 1... Tracking servo circuit, 2, 9... Phase compensation circuit, 3, 4, 10... Switch circuit, 5... Operational amplifier circuit, 6, 11... Drive circuit, 7... Fine actuator, 12... Coarse actuator.
Claims (1)
て光ヘツドを光デイスク上の所定の記録トラツク
にトラツキング制御すると共に、上記粗アクチユ
エータを用いて上記光ヘツドをシーク動作する光
デイスク装置において、 上記微アクチユエータを制御するフオーカスサ
ーボ回路は、上記粗アクチユエータによるシーク
動作中に、上記微アクチユエータに当該シーク動
作前に保持した直流電圧を供給するようにした ことを特徴とする光デイスク装置。[Claims for Utility Model Registration] An optical disk device that uses a fine actuator and a coarse actuator to control tracking of an optical head to a predetermined recording track on an optical disk, and uses the coarse actuator to perform a seek operation on the optical head. An optical disk device, wherein the focus servo circuit for controlling the fine actuator supplies the fine actuator with the DC voltage held before the seek operation during the seek operation by the coarse actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987124354U JPH0521699Y2 (en) | 1987-08-14 | 1987-08-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987124354U JPH0521699Y2 (en) | 1987-08-14 | 1987-08-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6431507U true JPS6431507U (en) | 1989-02-27 |
| JPH0521699Y2 JPH0521699Y2 (en) | 1993-06-03 |
Family
ID=31374007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987124354U Expired - Lifetime JPH0521699Y2 (en) | 1987-08-14 | 1987-08-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0521699Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057544A (en) * | 1983-09-07 | 1985-04-03 | Hitachi Ltd | Optical recording and reproducing device |
-
1987
- 1987-08-14 JP JP1987124354U patent/JPH0521699Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6057544A (en) * | 1983-09-07 | 1985-04-03 | Hitachi Ltd | Optical recording and reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0521699Y2 (en) | 1993-06-03 |
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