JPH0458817U - - Google Patents
Info
- Publication number
- JPH0458817U JPH0458817U JP9980890U JP9980890U JPH0458817U JP H0458817 U JPH0458817 U JP H0458817U JP 9980890 U JP9980890 U JP 9980890U JP 9980890 U JP9980890 U JP 9980890U JP H0458817 U JPH0458817 U JP H0458817U
- Authority
- JP
- Japan
- Prior art keywords
- thread
- servo circuit
- low
- pass filter
- amount
- 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 5
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図はこの考案に係る光デイスク再生装置の
スレツドサーボ回路の実施例を示したブロツク図
である。第２図は従来例のブロツク図である。
主な符号の説明、１……光デイスク、２……ス
ピンドルモータ、３……光ピツクアツプ、４……
サーボコントロール回路、５……トラツキングア
クチユエータドライバ、６……ローパスフイルタ
（ＬＰＦ）、７……ウインドウコンパレータ、８
……スレツドサーボ回路を制御するＣＰＵ、９…
…スレツドサーボ回路、１０……スレツドモータ
ドライバ、１１……スレツドモータ。
FIG. 1 is a block diagram showing an embodiment of a thread servo circuit for an optical disk reproducing apparatus according to the invention. FIG. 2 is a block diagram of a conventional example. Explanation of main symbols: 1... Optical disk, 2... Spindle motor, 3... Optical pick-up, 4...
Servo control circuit, 5... Tracking actuator driver, 6... Low pass filter (LPF), 7... Window comparator, 8
...CPU that controls the thread servo circuit, 9...
...Thread servo circuit, 10...Thread motor driver, 11...Thread motor.
Claims (1)
トラツキングアクチユエータドライブ信号でスレ
ツドモータを制御するスレツドサーボ回路におい
て、 上記トラツキングアクチユエータドライブ信号
の低域周波数成分を取り出すローパスフイルタと
、このローパスフイルタの出力信号よりデイスク
偏心量を検出するウインドウコンパレータとを備
え、内蔵したＣＰＵによりデイスク偏心量に応じ
てスレツドサーボ回路を制御するよう構成したこ
とを特徴とする光デイスク再生装置のスレツドサ
ーボ回路。[Scope of Claim for Utility Model Registration] In a thread servo circuit that controls a thread motor using a tracking actuator drive signal of a tracking servo system of an optical disc playback device, the low frequency component of the tracking actuator drive signal is An optical disk characterized in that it is equipped with a low-pass filter to take out the disc, and a window comparator that detects the amount of disk eccentricity from the output signal of the low-pass filter, and is configured such that a built-in CPU controls a thread servo circuit according to the amount of disk eccentricity. Thread servo circuit for playback equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9980890U JPH0458817U (en) | 1990-09-26 | 1990-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9980890U JPH0458817U (en) | 1990-09-26 | 1990-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0458817U true JPH0458817U (en) | 1992-05-20 |
Family
ID=31841998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9980890U Pending JPH0458817U (en) | 1990-09-26 | 1990-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0458817U (en) |
-
1990
- 1990-09-26 JP JP9980890U patent/JPH0458817U/ja active Pending
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