JPS63200253U - - Google Patents

Info

Publication number
JPS63200253U
JPS63200253U JP8946487U JP8946487U JPS63200253U JP S63200253 U JPS63200253 U JP S63200253U JP 8946487 U JP8946487 U JP 8946487U JP 8946487 U JP8946487 U JP 8946487U JP S63200253 U JPS63200253 U JP S63200253U
Authority
JP
Japan
Prior art keywords
disk
diameter
control circuit
signal
rotation control
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
JP8946487U
Other languages
Japanese (ja)
Other versions
JPH0610545Y2 (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 JP1987089464U priority Critical patent/JPH0610545Y2/en
Publication of JPS63200253U publication Critical patent/JPS63200253U/ja
Application granted granted Critical
Publication of JPH0610545Y2 publication Critical patent/JPH0610545Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)
  • Optical Recording Or Reproduction (AREA)

Description

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

図は本考案のデイスク再生装置の回転制御回路
図である。 ２…スピンドルモータ、３…１２cm径のＣＤデ
イスク、４…シングルＣＤデイスク、５…モータ
駆動回路、６…光ピツクアツプ、９…供給路、１
０，１１，１２，１３…ブリーダ抵抗、１４，１
５…スイツチングトランジスタ、１６，１７…ブ
リーダ抵抗、１８…切換回路。 The figure is a rotation control circuit diagram of the disc playback device of the present invention. 2... Spindle motor, 3... 12 cm diameter CD disk, 4... Single CD disk, 5... Motor drive circuit, 6... Optical pickup, 9... Supply path, 1
0, 11, 12, 13...Bleeder resistance, 14, 1
5... Switching transistor, 16, 17... Bleeder resistor, 18... Switching circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] スピンドルモータにてデイスクを回転し、光ピ
ツクアツプより放射される光ビームを前記デイス
ク上に照射し、該デイスクに記録されているＥＦ
Ｍ信号に応じ反射される光ビームを前記光ピツク
アツプで検出しＥＦＭ信号を再生し、回転制御回
路で前記ＥＦＭ信号と内部同期信号とを比較し得
られる駆動信号でモータの回転数を制御し、前記
光ピツクアツプより放射されデイスクを照射する
光ビームが一定の線速度でトラツキングするもの
において、デイスクの径を検出する径検出手段と
、該径検出手段によつて検出された検出信号で動
作され前記回転制御回路を切換える切換回路とを
設け、径の異なる数種のデイスクを再生する場合
に前記径検出手段で再生するデイスクの径の種類
を検出し、切換回路を切換え回転制御回路のゲイ
ンを制御し、スピンドルモータに印加される駆動
電流のレベルを再生する径のデイスクに応じた大
きさにすることを特徴とするデイスク再生装置の
回転制御回路。 The disk is rotated by a spindle motor, and a light beam emitted from an optical pickup is irradiated onto the disk to read the EF recorded on the disk.
detecting the light beam reflected in accordance with the M signal with the optical pickup and reproducing the EFM signal; controlling the rotation speed of the motor with the drive signal obtained by comparing the EFM signal and an internal synchronization signal in the rotation control circuit; In the device in which the light beam emitted from the optical pickup and irradiating the disk is tracked at a constant linear velocity, the disk is operated by a diameter detection means for detecting the diameter of the disk, and a detection signal detected by the diameter detection means. A switching circuit for switching the rotation control circuit is provided, and when playing several types of disks with different diameters, the diameter detection means detects the type of diameter of the disk to be played, and the switching circuit is switched to control the gain of the rotation control circuit. A rotation control circuit for a disk playback device, characterized in that the level of the drive current applied to the spindle motor is adjusted to a size according to the diameter of the disk to be played back.
JP1987089464U 1987-06-10 1987-06-10 Rotation control circuit for disc player Expired - Lifetime JPH0610545Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987089464U JPH0610545Y2 (en) 1987-06-10 1987-06-10 Rotation control circuit for disc player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987089464U JPH0610545Y2 (en) 1987-06-10 1987-06-10 Rotation control circuit for disc player

Publications (2)

Publication Number Publication Date
JPS63200253U true JPS63200253U (en) 1988-12-23
JPH0610545Y2 JPH0610545Y2 (en) 1994-03-16

Family

ID=30948468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987089464U Expired - Lifetime JPH0610545Y2 (en) 1987-06-10 1987-06-10 Rotation control circuit for disc player

Country Status (1)

Country Link
JP (1) JPH0610545Y2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173970A (en) * 1988-12-27 1990-07-05 Pioneer Electron Corp Rotation control system for disk player
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6174174A (en) * 1984-09-19 1986-04-16 Asahi Optical Co Ltd Gain automatic adjusting circuit of servo circuit
JPS61110375A (en) * 1984-10-31 1986-05-28 Sharp Corp Motor control device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6174174A (en) * 1984-09-19 1986-04-16 Asahi Optical Co Ltd Gain automatic adjusting circuit of servo circuit
JPS61110375A (en) * 1984-10-31 1986-05-28 Sharp Corp Motor control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02173970A (en) * 1988-12-27 1990-07-05 Pioneer Electron Corp Rotation control system for disk player
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

Also Published As

Publication number Publication date
JPH0610545Y2 (en) 1994-03-16

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