JPH0394664U - - Google Patents
Info
- Publication number
- JPH0394664U JPH0394664U JP237090U JP237090U JPH0394664U JP H0394664 U JPH0394664 U JP H0394664U JP 237090 U JP237090 U JP 237090U JP 237090 U JP237090 U JP 237090U JP H0394664 U JPH0394664 U JP H0394664U
- Authority
- JP
- Japan
- Prior art keywords
- pll circuit
- clv
- signal
- band pass
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Rotational Drive Of Disk (AREA)
Description
第１図は、この考案によるＣＬＶサーボ装置の
一実施例を示すブロツク図、第２図は、この考案
によるＣＬＶサーボ装置の他の実施例を示すブロ
ツク図、第３図は従来のＣＬＶサーボ装置のブロ
ツク図である。
１，１１，２１，２６，３６……増幅器、２…
…広帯域バンドパスフイルタ、３，５，２４……
ＰＬＬ回路、４……狭帯域バンドパスフイルタ、
６，７，２３，２７……分周器、８……位相比較
器、９……スイツチ、１０，２５，３５……ルー
プフイルタ、２２……可変帯域バンドパスフイル
タ、２６……増幅器、３１……ＦＶ変換器、３２
……加算器、３３……ピツアツプ位置検出器、３
４……割算器。
FIG. 1 is a block diagram showing one embodiment of the CLV servo device according to this invention, FIG. 2 is a block diagram showing another embodiment of the CLV servo device according to this invention, and FIG. 3 is a conventional CLV servo device. FIG. 1, 11, 21, 26, 36...Amplifier, 2...
...Broadband bandpass filter, 3, 5, 24...
PLL circuit, 4... narrowband bandpass filter,
6, 7, 23, 27... Frequency divider, 8... Phase comparator, 9... Switch, 10, 25, 35... Loop filter, 22... Variable band band pass filter, 26... Amplifier, 31 ...FV converter, 32
... Adder, 33 ... Pitup position detector, 3
4...Divider.
Claims (1)
御するＣＬＶサーボ装置において、 前記デイスクに形成されているウオブル（Ｗｏ
ｂｂｌｅ）をＷｏｂｂｌｅ信号として再生するウ
オブル再生手段と、 前記Ｗｏｂｂｌｅ信号を広帯域通過および狭帯
域通過するバンドパスフイルタと、 前記バンドパスフイルタからの出力をＰＬＬ制
御するＰＬＬ回路と、 を備え、粗サーボ時は前記バンドパスフイルタの
広帯域通過信号を前記ＰＬＬ回路に供給し、精サ
ーボ時は、前記バンドパスフイルタの狭帯域通過
信号を前記ＰＬＬ回路に供給することを特徴とす
るＣＬＶサーボ装置。[Claims for Utility Model Registration] In a CLV servo device that controls the rotational speed of a disk at constant linear velocity (CLV), a wobble formed on the disk is provided.
bble) as a Wobble signal; a bandpass filter that passes the Wobble signal in a wide band and a narrow band; and a PLL circuit that performs PLL control on the output from the bandpass filter. A CLV servo device characterized in that a broadband pass signal of the band pass filter is supplied to the PLL circuit, and during precision servo, a narrow band pass signal of the band pass filter is supplied to the PLL circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP237090U JPH0394664U (en) | 1990-01-17 | 1990-01-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP237090U JPH0394664U (en) | 1990-01-17 | 1990-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394664U true JPH0394664U (en) | 1991-09-26 |
Family
ID=31506247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP237090U Pending JPH0394664U (en) | 1990-01-17 | 1990-01-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394664U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6243866A (en) * | 1985-08-21 | 1987-02-25 | Hitachi Ltd | Time axis fluctuation correcting device of disc player |
| JPH01302575A (en) * | 1988-05-30 | 1989-12-06 | Sony Corp | Optical disk device |
-
1990
- 1990-01-17 JP JP237090U patent/JPH0394664U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6243866A (en) * | 1985-08-21 | 1987-02-25 | Hitachi Ltd | Time axis fluctuation correcting device of disc player |
| JPH01302575A (en) * | 1988-05-30 | 1989-12-06 | Sony Corp | Optical disk device |
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