JPH01181102U - - Google Patents

Info

Publication number
JPH01181102U
JPH01181102U JP7630988U JP7630988U JPH01181102U JP H01181102 U JPH01181102 U JP H01181102U JP 7630988 U JP7630988 U JP 7630988U JP 7630988 U JP7630988 U JP 7630988U JP H01181102 U JPH01181102 U JP H01181102U
Authority
JP
Japan
Prior art keywords
disk
magnetic field
coils
switching elements
recording surface
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
JP7630988U
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 JP7630988U priority Critical patent/JPH01181102U/ja
Publication of JPH01181102U publication Critical patent/JPH01181102U/ja
Pending legal-status Critical Current

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  • Recording Or Reproducing By Magnetic Means (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外部磁界の印
加装置を示す回路図、第２図は磁界印加用の電磁
コイルの一実施例を示す斜視図、第３図は光磁気
記録の原理を示す概要図、第４図は従来の外部磁
界の印加回路図である。 図中、Ｌ１，Ｌ２は外部磁界用の２つの電磁コ
イル、Ｑ１，Ｑ２はスイツチングトランジスタを
示す。 Fig. 1 is a circuit diagram showing an external magnetic field applying device showing an embodiment of the present invention, Fig. 2 is a perspective view showing an embodiment of an electromagnetic coil for applying a magnetic field, and Fig. 3 is the principle of magneto-optical recording. FIG. 4 is a conventional external magnetic field application circuit diagram. In the figure, L 1 and L 2 are two electromagnetic coils for external magnetic fields, and Q 1 and Q 2 are switching transistors.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一端が電源に共通接続されている２個のコイル
をデイスクの記録面に近接して配置し、前記２個
のコイルの他方の端子に２個のスイツチング素子
を接続し、前記２個のスイツチング素子を交互に
オン・オフする制御信号を供給することによつて
前記デイスクの記録面にＮ又はＳ極の磁界を印加
するようにしたことを特徴とする光磁気デイスク
の外部磁界印加装置。 Two coils, one end of which is commonly connected to a power supply, are placed close to the recording surface of the disk, two switching elements are connected to the other terminals of the two coils, and the two switching elements 1. An external magnetic field applying device for a magneto-optical disk, characterized in that an N or S pole magnetic field is applied to the recording surface of the disk by supplying a control signal that turns on and off alternately.
JP7630988U 1988-06-10 1988-06-10 Pending JPH01181102U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7630988U JPH01181102U (en) 1988-06-10 1988-06-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7630988U JPH01181102U (en) 1988-06-10 1988-06-10

Publications (1)

Publication Number Publication Date
JPH01181102U true JPH01181102U (en) 1989-12-27

Family

ID=31301342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7630988U Pending JPH01181102U (en) 1988-06-10 1988-06-10

Country Status (1)

Country Link
JP (1) JPH01181102U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030986A1 (en) * 1994-05-10 1995-11-16 Hitachi Maxell, Ltd. Magnetooptical recording medium, and method and apparatus for recording/reproduction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995030986A1 (en) * 1994-05-10 1995-11-16 Hitachi Maxell, Ltd. Magnetooptical recording medium, and method and apparatus for recording/reproduction

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