JPH0376257U - - Google Patents

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Publication number
JPH0376257U
JPH0376257U JP1989136642U JP13664289U JPH0376257U JP H0376257 U JPH0376257 U JP H0376257U JP 1989136642 U JP1989136642 U JP 1989136642U JP 13664289 U JP13664289 U JP 13664289U JP H0376257 U JPH0376257 U JP H0376257U
Authority
JP
Japan
Prior art keywords
disk
phase compensation
motor
phase
signal
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
Application number
JP1989136642U
Other languages
Japanese (ja)
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 JP1989136642U priority Critical patent/JPH0376257U/ja
Publication of JPH0376257U publication Critical patent/JPH0376257U/ja
Pending legal-status Critical Current

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

Description

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

第１図は本考案の一実施例を示す図、第２図は
従来例を示す図、第３図、第４図、第５図は従来
例を説明するための図である。 １……デイスク、２……ピツクアツプ、３……
モータ、４……プリアンプ、６……基準発振器、
７……位相比較回路、１１……ドライブ回路、１
２……第１の位相補償フイルタ、１３……第２の
位相補償フイルタ、１４……データ検出回路、Ｓ
Ｗ２……スイツチ。 FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a conventional example, and FIGS. 3, 4, and 5 are diagrams for explaining the conventional example. 1...Disk, 2...Pickup, 3...
Motor, 4...Preamplifier, 6...Reference oscillator,
7... Phase comparison circuit, 11... Drive circuit, 1
2...First phase compensation filter, 13...Second phase compensation filter, 14...Data detection circuit, S
W2...Switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] デイスクを回転するモータと、デイスクに記録
された信号を読み出すピツクアツプと、該ピツク
アツプから得られる信号から同期信号を検出する
手段、該同期信号と基準信号とを比較し、誤差信
号を出力する比較手段と、該比較手段から得られ
る出力をデイスク内周再生時に位相特性を補償す
る第１の位相補償手段と、該比較手段から得られ
る出力をデイスク外周再生時に位相特性に補償す
る第２の位相補償手段と、デイスクの内周、外周
いずれかを検出し、この検出出力によつて上記第
１の位相補償手段と第２の位相補償手段と選択す
る選択手段と、該選択手段によつて得られる信号
をモータに供給し、モータを所望の回転数に維持
する手段とからなるデイスクの回転制御回路。 A motor that rotates the disk, a pickup that reads out signals recorded on the disk, means for detecting a synchronization signal from the signal obtained from the pickup, and comparison means that compares the synchronization signal with a reference signal and outputs an error signal. a first phase compensation means for compensating the phase characteristics of the output obtained from the comparison means when reproducing the inner circumference of the disk; and a second phase compensation means for compensating the phase characteristic of the output obtained from the comparison means during reproduction of the outer circumference of the disk. means for detecting either the inner circumference or the outer circumference of the disk and selecting the first phase compensation means or the second phase compensation means based on the detection output; A disk rotation control circuit comprising means for supplying signals to the motor and maintaining the motor at a desired rotation speed.
JP1989136642U 1989-11-24 1989-11-24 Pending JPH0376257U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989136642U JPH0376257U (en) 1989-11-24 1989-11-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989136642U JPH0376257U (en) 1989-11-24 1989-11-24

Publications (1)

Publication Number Publication Date
JPH0376257U true JPH0376257U (en) 1991-07-31

Family

ID=31683839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989136642U Pending JPH0376257U (en) 1989-11-24 1989-11-24

Country Status (1)

Country Link
JP (1) JPH0376257U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027881A1 (en) * 1995-03-08 1996-09-12 Matsushita Electric Industrial Co., Ltd. Device and method for reproducing data from disk, method for controlling rotation of disk, and reproduction clock generating device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6488959A (en) * 1987-09-30 1989-04-03 Toshiba Corp Clv servo circuit for optical disk reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6488959A (en) * 1987-09-30 1989-04-03 Toshiba Corp Clv servo circuit for optical disk reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027881A1 (en) * 1995-03-08 1996-09-12 Matsushita Electric Industrial Co., Ltd. Device and method for reproducing data from disk, method for controlling rotation of disk, and reproduction clock generating device

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