JPS6415356U - - Google Patents

Info

Publication number
JPS6415356U
JPS6415356U JP1987110797U JP11079787U JPS6415356U JP S6415356 U JPS6415356 U JP S6415356U JP 1987110797 U JP1987110797 U JP 1987110797U JP 11079787 U JP11079787 U JP 11079787U JP S6415356 U JPS6415356 U JP S6415356U
Authority
JP
Japan
Prior art keywords
disk
rotations
information recording
servo circuit
detection means
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.)
Granted
Application number
JP1987110797U
Other languages
Japanese (ja)
Other versions
JPH067501Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1987110797U priority Critical patent/JPH067501Y2/en
Publication of JPS6415356U publication Critical patent/JPS6415356U/ja
Application granted granted Critical
Publication of JPH067501Y2 publication Critical patent/JPH067501Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)
  • Control Of Electric Motors In General (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案によるスピンドルサーボ回路を
有するデイスクプレーヤの構成の一例を示すブロ
ツク図、第２図は第１図における可変利得アンプ
の構成の一例を示す回路図、第３図はデイスク回
転数と制御電圧Ｖとの関係を示す図、第４図はデ
イスク回転数と利得との関係を示す図、第５図は
可変利得アンプの構成の他の例を示す回路図、第
６図はデイスク半径と検出電圧Ｖとの関係を示す
図、第７図はデイスク半径と利得との関係を示す
図、第８図はデイスク半径とデイスク回転数との
関係を示す図である。 主要部分の符号の説明、１……ＣＬＶデイスク
、２……スピンドルモータ、３……ピツクアツプ
、７……同期分離回路、８……データ検出回路、
１１……可変利得アンプ、１３……周波数発電機
、１４……コントローラ。 Fig. 1 is a block diagram showing an example of the configuration of a disk player having a spindle servo circuit according to the present invention, Fig. 2 is a circuit diagram showing an example of the configuration of the variable gain amplifier in Fig. 1, and Fig. 3 is a disk rotation speed. FIG. 4 is a diagram showing the relationship between disk rotation speed and gain, FIG. 5 is a circuit diagram showing another example of the configuration of a variable gain amplifier, and FIG. 6 is a diagram showing the relationship between disk rotation speed and gain. FIG. 7 is a diagram showing the relationship between the radius and the detected voltage V, FIG. 7 is a diagram showing the relationship between the disk radius and gain, and FIG. 8 is a diagram showing the relationship between the disk radius and the number of disk rotations. Explanation of symbols of main parts, 1...CLV disk, 2...Spindle motor, 3...Pickup, 7...Synchronization separation circuit, 8...Data detection circuit,
11...Variable gain amplifier, 13...Frequency generator, 14...Controller.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] デイスクプレーヤにおいて、ピツクアツプとの
相対線速度が一定の情報記録デイスクを回転駆動
するスピンドルモータの回転制御をなすスピンド
ルサーボ回路であつて、サーボループ内に設けら
れた可変利得アンプと、情報検出点のデイスク半
径位置に応じた前記情報記録デイスクの回転数を
検出する検出手段とを備え、この検出手段の検出
出力に応じて前記可変利得アンプの利得を前記回
転数に対して直線的に変化せしめることを特徴と
するスピンドルサーボ回路。 In a disk player, a spindle servo circuit controls the rotation of a spindle motor that rotationally drives an information recording disk whose linear velocity relative to the pickup is constant. and detection means for detecting the number of rotations of the information recording disk according to the radial position of the disk, and changing the gain of the variable gain amplifier linearly with respect to the number of rotations according to the detection output of the detection means. A spindle servo circuit featuring:
JP1987110797U 1987-07-20 1987-07-20 Spindle servo circuit Expired - Lifetime JPH067501Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987110797U JPH067501Y2 (en) 1987-07-20 1987-07-20 Spindle servo circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987110797U JPH067501Y2 (en) 1987-07-20 1987-07-20 Spindle servo circuit

Publications (2)

Publication Number Publication Date
JPS6415356U true JPS6415356U (en) 1989-01-26
JPH067501Y2 JPH067501Y2 (en) 1994-02-23

Family

ID=31348282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987110797U Expired - Lifetime JPH067501Y2 (en) 1987-07-20 1987-07-20 Spindle servo circuit

Country Status (1)

Country Link
JP (1) JPH067501Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105858U (en) * 1991-02-21 1992-09-11 アルパイン株式会社 Spindle motor servo circuit of optical disk device
JP2012059323A (en) * 2010-09-09 2012-03-22 Renesas Electronics Corp Optical disk device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587348A (en) * 1978-12-25 1980-07-02 Victor Co Of Japan Ltd Rotation control device for information recording medium disk
JPS60119664A (en) * 1983-11-30 1985-06-27 Sony Corp Rotating controller of disc
JPS6174174A (en) * 1984-09-19 1986-04-16 Asahi Optical Co Ltd Gain automatic adjusting circuit of servo circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587348A (en) * 1978-12-25 1980-07-02 Victor Co Of Japan Ltd Rotation control device for information recording medium disk
JPS60119664A (en) * 1983-11-30 1985-06-27 Sony Corp Rotating controller of disc
JPS6174174A (en) * 1984-09-19 1986-04-16 Asahi Optical Co Ltd Gain automatic adjusting circuit of servo circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105858U (en) * 1991-02-21 1992-09-11 アルパイン株式会社 Spindle motor servo circuit of optical disk device
JP2012059323A (en) * 2010-09-09 2012-03-22 Renesas Electronics Corp Optical disk device

Also Published As

Publication number Publication date
JPH067501Y2 (en) 1994-02-23

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