JPS6222763U

JPS6222763U -

Info

Publication number: JPS6222763U
Application number: JP11135785U
Authority: JP
Priority date: 1985-07-19
Filing date: 1985-07-19
Publication date: 1987-02-12

Description

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

第１図はスピンドルモータサーボ回路のブロツ
ク図、第２図はピツクアツプを示す図、第３図は
位置検出手段を示す図、第４図は光磁気デイスク
の平面図である。１０……スピンドルモータ、１１……ＣＡＶ制
御回路、１２……位置検出手段、１３……スレシ
ヨールド電圧作成手段、１４……比較手段、１５
……ＣＬＶ制御回路、１６……第１スイツチ。 FIG. 1 is a block diagram of a spindle motor servo circuit, FIG. 2 is a diagram showing a pickup, FIG. 3 is a diagram showing a position detecting means, and FIG. 4 is a plan view of a magneto-optical disk. 10... Spindle motor, 11... CAV control circuit, 12... Position detection means, 13... Threshold voltage creation means, 14... Comparison means, 15
...CLV control circuit, 16...first switch.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

ピツクアツプの位置検出手段と、所定のスレシ
ヨールド電圧と前記位置検出手段出力とを比較す
る比較手段と、デイスク状記録媒体を回転せしめ
るスピンドルモータと、該スピンドルモータをＣ
ＡＶ制御するＣＡＶ制御回路と、前記スピンドル
モータをＣＬＶ制御するＣＬＶ制御回路と、前記
比較手段出力に基づき前記ＣＡＶ制御回路出力又
はＣＬＶ制御回路出力の一方を選択して前記スピ
ンドルモータに供給するスイツチ手段を備えるデ
イスク状記録媒体記録装置。 a pickup position detection means; a comparison means for comparing a predetermined threshold voltage with the output of the position detection means; a spindle motor for rotating a disk-shaped recording medium;
A CAV control circuit that performs AV control, a CLV control circuit that performs CLV control of the spindle motor, and a switch means that selects either the CAV control circuit output or the CLV control circuit output based on the output of the comparison means and supplies the selected one to the spindle motor. A disk-shaped recording medium recording device comprising: