JPH0296657U - - Google Patents
Info
- Publication number
- JPH0296657U JPH0296657U JP282289U JP282289U JPH0296657U JP H0296657 U JPH0296657 U JP H0296657U JP 282289 U JP282289 U JP 282289U JP 282289 U JP282289 U JP 282289U JP H0296657 U JPH0296657 U JP H0296657U
- Authority
- JP
- Japan
- Prior art keywords
- optical disc
- disc player
- control signal
- sensor
- spindle motor
- 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 10
- 238000010586 diagram Methods 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
Landscapes
- Rotational Drive Of Disk (AREA)
Description
第１図は本考案の一実施例を示すＣＤプレーヤ
のブロツク構成図、第２図は本考案の第１の考案
にかかるスピンドルサーボユニツトの回路図、第
３図は本考案の第２の考案にかかるスピンドルサ
ーボユニツトの回路図、第４図は位相制御信号の
発生動作を示すタイミングチヤート、第５図は周
波数制御信号の発生動作を示すタイミングチヤー
トである。
１……ＣＤ（コンパクトデイスク）、２……光
学ピツクアツプ、４……データプロセツサ、５…
…システムコントローラ、６……センサ、７……
サーボプロセツサ、９……スピンドルモータ、１
０……スピンドルサーボユニツト。
Fig. 1 is a block configuration diagram of a CD player showing an embodiment of the present invention, Fig. 2 is a circuit diagram of a spindle servo unit according to the first invention of the invention, and Fig. 3 is a circuit diagram of the spindle servo unit according to the first invention of the invention. FIG. 4 is a timing chart showing the phase control signal generation operation, and FIG. 5 is a timing chart showing the frequency control signal generation operation. 1...CD (compact disk), 2...Optical pickup, 4...Data processor, 5...
...System controller, 6...Sensor, 7...
Servo processor, 9...Spindle motor, 1
0...Spindle servo unit.
Claims (1)
回転させるスピンドルモータと、このスピンドル
モータの回転速度を周波数および位相の両面で制
御するサーボ回路を有する光デイスクプレーヤに
おいて、 前記サーボ回路の周波数制御信号と位相制御信
号を加算する加算回路と、前記光デイスクのサイ
ズを検出するセンサと、このセンサにより検出さ
れたデイスクサイズに応じて前記加算回路より出
力される制御信号の振幅を可変する振幅変更回路
とを具備したことを特徴とする光デイスクプレー
ヤ。 (2) 異なるサイズの光デイスクを所定の速度で
回転させるスピンドルモータと、このスピンドル
モータの回転速度を周波数および位相の両面で制
御するサーボ回路を有する光デイスクプレーヤに
おいて、 前記光デイスクのサイズを検出するセンサと、
このセンサにより検出されたデイスクサイズに応
じて前記サーボ回路における制御信号のパルスの
デユーテイを切り換えるデユーテイ切換手段とを
具備したことを特徴とする光デイスクプレーヤ。[Claims for Utility Model Registration] (1) In an optical disc player having a spindle motor that rotates optical discs of different sizes at a predetermined speed, and a servo circuit that controls the rotational speed of this spindle motor in terms of both frequency and phase. , an adder circuit that adds the frequency control signal and phase control signal of the servo circuit, a sensor that detects the size of the optical disk, and a control signal that is output from the adder circuit in accordance with the disk size detected by the sensor. An optical disc player comprising: an amplitude changing circuit that varies the amplitude of the optical disc player. (2) In an optical disc player having a spindle motor that rotates optical discs of different sizes at a predetermined speed, and a servo circuit that controls the rotational speed of the spindle motor in terms of both frequency and phase, the size of the optical disc is detected. A sensor that
An optical disc player comprising: duty switching means for switching the duty of the pulse of the control signal in the servo circuit according to the disc size detected by the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP282289U JPH0296657U (en) | 1989-01-13 | 1989-01-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP282289U JPH0296657U (en) | 1989-01-13 | 1989-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0296657U true JPH0296657U (en) | 1990-08-01 |
Family
ID=31203930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP282289U Pending JPH0296657U (en) | 1989-01-13 | 1989-01-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0296657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000043998A1 (en) * | 1999-01-25 | 2000-07-27 | Matsushita Electric Industrial Co., Ltd. | Disk device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954073A (en) * | 1982-09-21 | 1984-03-28 | Nec Home Electronics Ltd | Digital audio disk player |
| JPS6040566A (en) * | 1983-08-12 | 1985-03-02 | Mitsubishi Electric Corp | Revolution control servo system of information recording disk |
| JPS61158065A (en) * | 1984-12-29 | 1986-07-17 | Canon Inc | Device for recording and reproducing information |
-
1989
- 1989-01-13 JP JP282289U patent/JPH0296657U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954073A (en) * | 1982-09-21 | 1984-03-28 | Nec Home Electronics Ltd | Digital audio disk player |
| JPS6040566A (en) * | 1983-08-12 | 1985-03-02 | Mitsubishi Electric Corp | Revolution control servo system of information recording disk |
| JPS61158065A (en) * | 1984-12-29 | 1986-07-17 | Canon Inc | Device for recording and reproducing information |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000043998A1 (en) * | 1999-01-25 | 2000-07-27 | Matsushita Electric Industrial Co., Ltd. | Disk device |
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