JPS595051U - magnetic disk device - Google Patents

magnetic disk device

Info

Publication number
JPS595051U
JPS595051U JP9774382U JP9774382U JPS595051U JP S595051 U JPS595051 U JP S595051U JP 9774382 U JP9774382 U JP 9774382U JP 9774382 U JP9774382 U JP 9774382U JP S595051 U JPS595051 U JP S595051U
Authority
JP
Japan
Prior art keywords
compares
magnetic disk
disk device
signal obtained
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
Application number
JP9774382U
Other languages
Japanese (ja)
Inventor
竹夫 増田
Original Assignee
富士通株式会社
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 by 富士通株式会社 filed Critical 富士通株式会社
Priority to JP9774382U priority Critical patent/JPS595051U/en
Publication of JPS595051U publication Critical patent/JPS595051U/en
Pending legal-status Critical Current

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  • Rotational Drive Of Disk (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は本考案の磁気ディスク装置の一実施例、第２図
１，２は第１図における各部の波形をそれぞれ示し、さ
らに図において１は発振器、２はモータ回転検出器、３
はサーボヘッド、４は増幅器、５はセクタ分離回路、６
，７は比較回路、８は論理和回路をそれぞれ示す。FIG. 1 shows an embodiment of the magnetic disk device of the present invention, and FIGS. 2 and 2 show waveforms of various parts in FIG.
is a servo head, 4 is an amplifier, 5 is a sector separation circuit, 6
, 7 represents a comparison circuit, and 8 represents an OR circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 基準周波数で発振する発振回路と、回転起動時に前記発
振回路出力とディスクの回転毎に得られる信号とを比較
する第１の比較回路と、ディスクが定常回転に達したあ
とに、発振回路出力と、サーボ面より得られるセクタ信
号とを比較する第二の比較回路とをもち、第一、第二の
比較回路出力によりディスクを回転させるＤＣモータの
電流を制御して回転数を制御するよう構成した磁気ディ
スク装置。An oscillation circuit that oscillates at a reference frequency, a first comparison circuit that compares the oscillation circuit output with a signal obtained each time the disk rotates when the rotation starts, and a first comparison circuit that compares the oscillation circuit output with a signal obtained each time the disk rotates, and , and a second comparison circuit that compares the sector signal obtained from the servo surface, and is configured to control the rotation speed by controlling the current of the DC motor that rotates the disk by the outputs of the first and second comparison circuits. magnetic disk device.
JP9774382U 1982-06-29 1982-06-29 magnetic disk device Pending JPS595051U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9774382U JPS595051U (en) 1982-06-29 1982-06-29 magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9774382U JPS595051U (en) 1982-06-29 1982-06-29 magnetic disk device

Publications (1)

Publication Number Publication Date
JPS595051U true JPS595051U (en) 1984-01-13

Family

ID=30232365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9774382U Pending JPS595051U (en) 1982-06-29 1982-06-29 magnetic disk device

Country Status (1)

Country Link
JP (1) JPS595051U (en)

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