JPS63200270U - - Google Patents
Info
- Publication number
- JPS63200270U JPS63200270U JP8866687U JP8866687U JPS63200270U JP S63200270 U JPS63200270 U JP S63200270U JP 8866687 U JP8866687 U JP 8866687U JP 8866687 U JP8866687 U JP 8866687U JP S63200270 U JPS63200270 U JP S63200270U
- Authority
- JP
- Japan
- Prior art keywords
- access mechanism
- access
- fine
- coarse
- optical disk
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Description
第１図は、本考案の光デイスクドライブアクセ
ス制御回路の１実施例のブロツク図。第２図は、
第１図の実施例の回路図の一例。第３図は、第１
図の実施例の回路図の一例。第４図は、第１図の
実施例の回路図の一例。
１…デイスクトラツク面、２…増幅器、３…位
相補償回路、４…駆動回路、５…レンズアクチユ
エータ、６…速度検出器、７…スイツチ、８…前
置増幅器、９…増幅器、１０…微分器、１１…ス
イツチ、Ａ…オペアンプ、Ｒ…抵抗、Ｃ…コンデ
ンサ、Ｌ…コイル。
FIG. 1 is a block diagram of one embodiment of the optical disk drive access control circuit of the present invention. Figure 2 shows
An example of a circuit diagram of the embodiment of FIG. 1. Figure 3 shows the first
An example of a circuit diagram of the embodiment shown in the figure. FIG. 4 is an example of a circuit diagram of the embodiment shown in FIG. DESCRIPTION OF SYMBOLS 1...Disk track surface, 2...Amplifier, 3...Phase compensation circuit, 4...Drive circuit, 5...Lens actuator, 6...Speed detector, 7...Switch, 8...Preamplifier, 9...Amplifier, 10... Differentiator, 11... Switch, A... Operational amplifier, R... Resistor, C... Capacitor, L... Coil.
Claims (1)
ために少なくとも粗アクセス機構と該粗アクセス
機構上に固定された密アクセス機構との２段サー
ボ機構を有する光デイスクドライブアクセス制御
回路において、前記の粗アクセス機構によるアク
セスの際には前記の密アクセス機構の粗アクセス
機構に対する相対速度を速度信号として検出する
手段と、該速度信号を前記の密アクセス機構の駆
動回路にアクセス時において切り換えフイードバ
ツク入力する手段を有することを特徴とする光デ
イスクドライブアクセス制御回路。 In an optical disk drive access control circuit having a two-stage servo mechanism including at least a coarse access mechanism and a fine access mechanism fixed on the coarse access mechanism for accessing any track on the optical disk, the coarse access mechanism means for detecting the relative speed of the fine access mechanism with respect to the coarse access mechanism as a speed signal when accessing the fine access mechanism; and means for switching and inputting the speed signal to the drive circuit of the fine access mechanism as a feedback input at the time of access. An optical disk drive access control circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8866687U JPS63200270U (en) | 1987-06-09 | 1987-06-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8866687U JPS63200270U (en) | 1987-06-09 | 1987-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63200270U true JPS63200270U (en) | 1988-12-23 |
Family
ID=30946962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8866687U Pending JPS63200270U (en) | 1987-06-09 | 1987-06-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63200270U (en) |
-
1987
- 1987-06-09 JP JP8866687U patent/JPS63200270U/ja active Pending
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