JPH0458854U - - Google Patents
Info
- Publication number
- JPH0458854U JPH0458854U JP10095590U JP10095590U JPH0458854U JP H0458854 U JPH0458854 U JP H0458854U JP 10095590 U JP10095590 U JP 10095590U JP 10095590 U JP10095590 U JP 10095590U JP H0458854 U JPH0458854 U JP H0458854U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical disk
- servo circuit
- constant period
- phase comparator
- 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 6
- 230000001360 synchronised effect Effects 0.000 claims 2
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Rotational Drive Of Disk (AREA)
Description
第１図はこの考案に係る光デイスク装置のスピ
ンドルサーボ回路のブロツク図、第２図は従技術
のブロツク図である。
主な符号の説明、１……光ピツクアツプ、２…
…光デイスク、３……一定周期の信号、５……バ
ンドパスフイルタ、６……分周器、７……位相比
較器、７ａ……誤差信号、８……基準信号、９…
…同期発振器、９ｅ……同期信号、１０……スイ
ツチ、１１……同期検出器。
FIG. 1 is a block diagram of a spindle servo circuit of an optical disk device according to this invention, and FIG. 2 is a block diagram of a prior art. Explanation of main symbols, 1... Optical pickup, 2...
... Optical disk, 3 ... Signal of constant period, 5 ... Band pass filter, 6 ... Frequency divider, 7 ... Phase comparator, 7a ... Error signal, 8 ... Reference signal, 9 ...
...Synchronization oscillator, 9e...Synchronization signal, 10...Switch, 11...Synchronization detector.
Claims (1)
号を検出し、この信号と基準信号とを位相比較器
で位相比較し、この比較結果に基づき位相補償を
行ないスピンドルモータを駆動するようにした光
デイスク装置のスピンドルサーボ回路において、 前記一定周期の信号に同期して発振する同期発
振器とスイツチとを設け、前記一定周期の信号若
しくは同期発振器の発振出力を前記スイツチを介
して選択的に前記位相比較器へ導くように構成し
たことを特徴とする光デイスク装置のスピドルサ
ーボ回路。[Claims for Utility Model Registration] A spindle motor that detects a signal with a constant period included in the reproduction signal of an optical disk, compares the phase of this signal with a reference signal using a phase comparator, and performs phase compensation based on the comparison result. A spindle servo circuit for an optical disk device is provided with a synchronous oscillator that oscillates in synchronization with the constant period signal and a switch, and the constant period signal or the oscillation output of the synchronous oscillator is transmitted through the switch. A spindle servo circuit for an optical disk device, characterized in that the spindle servo circuit is configured to selectively guide the phase comparator to the phase comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10095590U JPH0458854U (en) | 1990-09-28 | 1990-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10095590U JPH0458854U (en) | 1990-09-28 | 1990-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0458854U true JPH0458854U (en) | 1992-05-20 |
Family
ID=31844005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10095590U Pending JPH0458854U (en) | 1990-09-28 | 1990-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0458854U (en) |
-
1990
- 1990-09-28 JP JP10095590U patent/JPH0458854U/ja active Pending
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