JPS62289904A - Driving controller for magnetic head - Google Patents

Driving controller for magnetic head

Info

Publication number
JPS62289904A
JPS62289904A JP13402686A JP13402686A JPS62289904A JP S62289904 A JPS62289904 A JP S62289904A JP 13402686 A JP13402686 A JP 13402686A JP 13402686 A JP13402686 A JP 13402686A JP S62289904 A JPS62289904 A JP S62289904A
Authority
JP
Japan
Prior art keywords
magnetic head
recording
current
erasing
erasure
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
JP13402686A
Other languages
Japanese (ja)
Inventor
Takahiro Miwa
貴広 三輪
Hiroshi Nishikawa
浩 西川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP13402686A priority Critical patent/JPS62289904A/en
Publication of JPS62289904A publication Critical patent/JPS62289904A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE:To improve erasure and recording performance by selecting two current supply means, and supplying a one-gap magnetic head with a current which has superior overwrite characteristics at the time of erasure or superior reproduction output characteristics at the time of recording. CONSTITUTION:A CPU 11 outputs a control signal to a switch switching driving circuit 13 and a heat driving control circuit 14 according to a control program stored in a program memory 12 composed of a ROM. A switch is switched to a resistance R at the time of erasure or to a resistance (r) having a smaller value than the resistance R at the time of recording to supply a current which has superior reproduction output characteristics or resolution characteristics to the magnetic head 17. Then, even the magnetic head which operates by one gap has superior erasure, and recording and reproduction characteristics.

Description

【発明の詳細な説明】 ３、発明の詳細な説明 （産業上の利用分野） この発明は磁気ヘッドの駆動制御＠置に係り、詳しくは
消去と記録を１つのギャップで行なう磁気ヘッドの消去
時と記録時における駆動制御ｌｌ装置に関するものであ
る。[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) This invention relates to the drive control of a magnetic head, and more specifically, to the erasing of a magnetic head in which erasing and recording are performed in one gap. and a drive control device during recording.

（従来技術） 一般に、フロッピーディスク等の磁気記録媒体と磁気ヘ
ッドとの関係において、第３図に示すように記録媒体に
記憶された情報を消去する場合にはオーバライト特性を
よくするために磁気ヘッドに供給する駆動電流（消去電
流）は大きいほうが望ましく、反対に、記録媒体に情報
を記録する場合には再生出力特性及び分解能特性をよく
するために磁気ヘッドに供給する駆動電流（記録電流）
は小さいほうが望ましいことが知られている。(Prior Art) In general, in the relationship between a magnetic recording medium such as a floppy disk and a magnetic head, as shown in Figure 3, when erasing information stored on the recording medium, magnetic It is desirable that the driving current (erasing current) supplied to the head be large. Conversely, when recording information on a recording medium, the driving current (recording current) supplied to the magnetic head is required to improve reproduction output characteristics and resolution characteristics.
It is known that a smaller value is more desirable.

〈発明が解決しようとする問題点） ところが、消去と記録を１つのギャップで行なう磁気ヘ
ッドにおいては消去時及び記録時とも同じ値の駆動電流
しか供給できなかった。従って、オーバライト特性、再
生出力特性及び分解能特性等の各特性を全て満足するこ
とはできなかった。(Problems to be Solved by the Invention) However, in a magnetic head that performs erasing and recording in one gap, only the same value of drive current can be supplied during erasing and recording. Therefore, it was not possible to satisfy all characteristics such as overwrite characteristics, reproduction output characteristics, and resolution characteristics.

ぞの結果、消去及び記録に支障をきたさない、即ち、各
特性をある程度犠牲したところの駆動電流値（第３図中
、駆動電流１ａ）を設定して磁気ヘッドに供給していた
。As a result, a drive current value (drive current 1a in FIG. 3) that does not interfere with erasing and recording, that is, sacrifices some of the characteristics, is set and supplied to the magnetic head.

（発明の目的） この発明の目的は上記問題点を解消し、磁気ヘッドに供
給する駆動電流を制御し、消去時にはオーバライト特性
のよい消去が行え、記録時には再生出力特性及び分解能
特性のよい記録を行なうことのできる磁気ヘッドの駆動
制御装置を提供することにある。(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, to control the drive current supplied to the magnetic head, to perform erasing with good overwrite characteristics during erasing, and to record with good reproduction output characteristics and resolution characteristics during recording. An object of the present invention is to provide a magnetic head drive control device that can perform the following operations.

（問題点を解決するための手段） この発明は上記目的を達成すべく、第１図に示すように
消去と記録を１つのギャップで行なう磁気ヘッド１と、
前記磁気ヘッド１にオーバライト特性に優れた値の消去
電流を供給する第１の電流供給手段２と、前記磁気ヘッ
ド１に再生出力特性に優れた記録電流を供給する第２の
電流供給手段３と、消去時には前記第１の電流供給手段
２を選択して消去電流を前記磁気ヘッド１に供給し、記
録時には前記第２の電流供給手段３を選択して記録電流
を磁気ヘッド１に供給する制御手段４とからなる磁気ヘ
ッドの駆動制御装置をその要旨としたものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a magnetic head 1 that performs erasing and recording in one gap, as shown in FIG.
a first current supply means 2 for supplying the magnetic head 1 with an erase current having a value excellent in overwrite characteristics; and a second current supply means 3 for supplying the magnetic head 1 with a recording current having an excellent reproduction output characteristic. When erasing, the first current supply means 2 is selected to supply an erase current to the magnetic head 1, and during recording, the second current supply means 3 is selected to supply a recording current to the magnetic head 1. The gist of the present invention is a magnetic head drive control device comprising a control means 4.

（作用） 上記手段により、制御手段４は消去時には第１の電流供
給手段２を選択してオーバライト特性に優れた値の消去
電流を磁気ヘッド１に供給して記録媒体に記録した情報
を消去し、記録時には第２の電流供給手段３を選択して
再生出力特性に優れた記録電流を磁気ヘッド１に供給し
て、記録媒体、　に情報を記録する。(Function) With the above means, the control means 4 selects the first current supply means 2 at the time of erasing, supplies an erase current having a value excellent in overwrite characteristics to the magnetic head 1, and erases the information recorded on the recording medium. However, during recording, the second current supply means 3 is selected to supply a recording current with excellent reproduction output characteristics to the magnetic head 1, thereby recording information on the recording medium.

（実施例） 以下、この発明をフロッピーディスク装置の磁気ヘッド
に具体化した一実施例を図面に従って説明する。(Embodiment) An embodiment in which the present invention is embodied in a magnetic head of a floppy disk device will be described below with reference to the drawings.

第２図において、制御手段としての中央処理装置（以下
、ＣＰＵという）１１は読み出し専用メモリ（ＲＯＭ）
よりなるプログラムメモリ１２に記憶された制御プログ
ラムに基づいて後記する磁気ヘッド１７に供給する駆動
電流を制御するための制御信号をスイッチ切換駆動回路
１３及びヘッド駆動制御回路１４に出力する。すなわち
、ＣＰＵ１１は外部装置から図示しないフロッピーディ
スクに記録された情報を消去処理動作又は同ディスクに
情報を記録する書込み処理動作（記録処理動作）のため
の指令信号を入力したとき、その指令信号に基づいて前
記磁気ヘッド１７を駆動制御してフロッピーディスクに
対して消去処理又は記録処理を実行する。又、ＣＰＵ１
１は読み出し及び書替え可能なメモリ（ＲＡＭ）よりな
る作業用メモリ１５を備え、同メモリ１５は演算結束又
は記録するためのデータ等が一時記憶されるようになっ
ている。In FIG. 2, a central processing unit (hereinafter referred to as CPU) 11 as a control means is a read-only memory (ROM).
A control signal for controlling a drive current supplied to a magnetic head 17 (to be described later) is output to a switch changeover drive circuit 13 and a head drive control circuit 14 based on a control program stored in a program memory 12 consisting of the following. That is, when the CPU 11 receives a command signal from an external device for erasing information recorded on a floppy disk (not shown) or for writing (recording operation) to record information on the same disk, the CPU 11 performs an operation based on the command signal. Based on this, the magnetic head 17 is driven and controlled to execute erasing or recording processing on the floppy disk. Also, CPU1
1 is equipped with a working memory 15 consisting of a readable and rewritable memory (RAM), and the memory 15 is adapted to temporarily store data for calculation or recording.

そして、ＣＰＵ１１は図示しないフロッピーディスクに
記録された情報を消去する消去処理動作の場合には前記
両回路１３．１４に消去のための制御信号を出力し、同
ディスクに情報を記録する書込み処理動作の場合にはス
イッチ切換駆動回路１３に記録のための制御信号を、又
ヘッド駆動制御回路１４に同ディスクに記録するための
データ＝５− 信号が出力される。In the case of an erasure processing operation for erasing information recorded on a floppy disk (not shown), the CPU 11 outputs a control signal for erasing to both circuits 13 and 14, and a write processing operation for recording information on the same disk. In this case, a control signal for recording is output to the switch changeover drive circuit 13, and a data=5- signal for recording on the disk is output to the head drive control circuit 14.

第１の抵抗Ｒと第２の抵抗ｒはそれぞれ異なる抵抗値（
Ｒ＜ｒ）であって、両抵抗Ｒ，ｒは互いに並列に接続さ
れ切換スイッチ１６を介して電源ＶＣＣに接続されてい
る。The first resistance R and the second resistance r have different resistance values (
R<r), and both resistors R and r are connected in parallel with each other and connected to the power supply VCC via a changeover switch 16.

前記スイッチ切換駆動回路１３は前記切換スイッチ１６
を切換Ｉｆ御するものであって、前記ＣＰＵ１１からの
消去のための制御信号に応答して第１の抵抗Ｒに、反対
に前記記録のための制御信号に応答して第２の抵抗ｒに
切換スイッチ１６を切換えるようになっている。The switch changeover drive circuit 13 is connected to the changeover switch 16.
The first resistor R is switched in response to a control signal for erasing from the CPU 11, and the second resistor r is switched in response to a control signal for recording from the CPU 11. A changeover switch 16 is used to change over the changeover.

前記ヘッド駆動制御回路１４は本実施例ではヘッドアン
プＩＣよりなり、ＣＰＬＪｌｌからの消去のための制御
信号又はデータ信号を入力し、次段の磁気ヘッド１７に
消去電流又はデータ信号に対応した記録電流を出力する
ようになっている。この時、ヘッド駆動制御回路１４は
前記第１の抵抗Ｒ又は第２の抵抗ｒを介して印加される
電流値に基づいて異なる値の駆動電流を磁気ヘッド１７
に供給するようになっている。In this embodiment, the head drive control circuit 14 is composed of a head amplifier IC, inputs a control signal or a data signal for erasing from the CPLJll, and supplies a recording current corresponding to the erasing current or data signal to the magnetic head 17 at the next stage. It is designed to output . At this time, the head drive control circuit 14 applies different values of drive current to the magnetic head 17 based on the current value applied via the first resistor R or the second resistor r.
It is designed to be supplied to

すなわち、第１の抵抗Ｒが切換スイッチ１６で選択され
同抵抗Ｒを介して印加された電流値を入力した時には、
ヘッド駆動制御回路１４は第３図に示すようにオーバラ
イト特性に優れ消去電流に適した値の駆動電流（以下、
これを最適消去電流１ｂという）を磁気ヘッド１７に供
給する。反対に、第２の抵抗ｒが切換スイッチ１６で選
択され同抵抗ｒを介して印加された電流値を入力した詩
には、ヘッド駆動制御回路１４は再生出力特性に優れ記
録電流に適した値の駆動電流（以下、これを最適記録電
流１ｃという）を供給する。That is, when the first resistor R is selected by the changeover switch 16 and the current value applied through the same resistor R is input,
As shown in FIG. 3, the head drive control circuit 14 has excellent overwrite characteristics and a drive current (hereinafter referred to as
This is called an optimum erase current 1b) is supplied to the magnetic head 17. On the other hand, when the second resistor r is selected by the selector switch 16 and the current value applied through the resistor r is input, the head drive control circuit 14 selects a value suitable for the recording current with excellent reproduction output characteristics. (hereinafter referred to as the optimum recording current 1c).

磁気ヘッド１７は消去及び記録を１つのギャップで行な
う磁気ヘッドであって、前記Ｒ過消去電流１ｂでフロッ
ピーディスクに記録された情報を消去するとともに、最
適記録電流ｉｂで同ディスクに情報を記録する。従って
、消去の際には第３図に示すように大きな値の最適消去
電流１ｂで磁気ヘッド１７は駆動され、記録の際には第
３図に示すように最適消去電流１ｂより小さな値の最適
記録電流ＩＣ（＜Ｉｂ）でヘッド１７は駆動されること
になる。The magnetic head 17 is a magnetic head that performs erasing and recording in one gap, and erases information recorded on the floppy disk with the R over-erase current 1b, and records information on the same disk with the optimum recording current ib. . Therefore, during erasing, the magnetic head 17 is driven with an optimal erasing current 1b having a large value as shown in FIG. The head 17 is driven by the recording current IC (<Ib).

このように本実施例においては、消去の際と記録の際に
電源Ｖｃｃから供給途中の第１及び第２の抵抗値Ｒ，ｒ
を選択して切換えることにより、磁気ヘッド１７に供給
する電流を制御し、消去時にはオーバライト特性のよい
消去が行え、記録時には再生出力特性及び分解能特性の
よい記録を行なうことができる。In this way, in this embodiment, the first and second resistance values R, r are supplied from the power supply Vcc during erasing and recording.
By selecting and switching, the current supplied to the magnetic head 17 can be controlled, erasing with good overwrite characteristics can be performed during erasing, and recording with good reproduction output characteristics and resolution characteristics can be performed during recording.

なお、この発明は上記実施例に限定されるものでなく、
例えば第１及び第２の電流供給手段２゜３はフロッピー
ディスクの内周と外周で供給電流を切換えるための機能
を備えたヘッドアンプ装置と同様のものを採用すること
も可能である。又、この発明はフロッピーディスク装置
の他にも各種のハードディスク装置に応用してもよい。Note that this invention is not limited to the above embodiments,
For example, the first and second current supply means 2.3 may be similar to a head amplifier device having a function of switching the supply current between the inner and outer circumferences of the floppy disk. Further, the present invention may be applied to various hard disk devices in addition to floppy disk devices.

発明の効果 以上詳述したように、この発明は磁気ヘッドに供給する
電流を制御することにより、消去時にはオーバライト特
性のよい消去が行え、記録時には再生出力特性及び分解
能特性のよい記録を行なうことができる優れた効果を発
揮する。Effects of the Invention As detailed above, the present invention enables erasing with good overwrite characteristics during erasing and recording with good reproduction output characteristics and resolution characteristics during recording by controlling the current supplied to the magnetic head. Demonstrates excellent effects.

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

第１図はこの発明の詳細な説明プるためのクレーム対応
図、第２図はこの発明を具体化した磁気ヘッドの駆動制
御装置の電気的構成を示す電気回路図、第３図は磁気ヘ
ッドの駆動電流と出力電圧の関係を示す図である。 図中、１１はＣＰＵ１１３はスイッチ切換駆動回路、１
４はヘッド駆動制御回路、１６は切換スイッチ、１７は
磁気ヘッド、Ｒは第１の抵抗、ｒは第２の抵抗である。FIG. 1 is a diagram corresponding to claims for detailed explanation of the present invention, FIG. 2 is an electric circuit diagram showing the electrical configuration of a magnetic head drive control device embodying the present invention, and FIG. 3 is a diagram showing a magnetic head drive control device embodying the present invention. FIG. 3 is a diagram showing the relationship between the drive current and output voltage of FIG. In the figure, 11 is a CPU 113 which is a switch switching drive circuit;
4 is a head drive control circuit, 16 is a changeover switch, 17 is a magnetic head, R is a first resistor, and r is a second resistor.

Claims (1)

【特許請求の範囲】 １、消去と記録を１つのギャップで行なう磁気ヘッド（
１）と、 前記磁気ヘッド（１）にオーバライト特性に優れた値の
消去電流を供給する第１の電流供給手段（２）と、 前記磁気ヘッド（１）に再生出力特性に優れた記録電流
を供給する第２の電流供給手段（３）と、消去時には前
記第１の電流供給手段（２）を選択して消去電流を前記
磁気ヘッド（１）に供給し、記録時には前記第２の電流
供給手段（３）を選択して記録電流を磁気ヘッド（１）
に供給する制御手段（４）と からなる磁気ヘッドの駆動制御装置。[Claims] 1. A magnetic head that performs erasing and recording in one gap (
1), a first current supply means (2) for supplying the magnetic head (1) with an erase current having a value excellent in overwrite characteristics; and a first current supply means (2) supplying the magnetic head (1) with a recording current having a value excellent in reproduction output characteristics. a second current supply means (3) for supplying the magnetic head; and during erasing, the first current supply means (2) is selected to supply the erase current to the magnetic head (1), and during recording, the second current supply means (2) is selected. Select the supply means (3) to supply the recording current to the magnetic head (1)
A drive control device for a magnetic head, comprising a control means (4) for supplying a magnetic head.
JP13402686A 1986-06-10 1986-06-10 Driving controller for magnetic head Pending JPS62289904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13402686A JPS62289904A (en) 1986-06-10 1986-06-10 Driving controller for magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13402686A JPS62289904A (en) 1986-06-10 1986-06-10 Driving controller for magnetic head

Publications (1)

Publication Number Publication Date
JPS62289904A true JPS62289904A (en) 1987-12-16

Family

ID=15118639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13402686A Pending JPS62289904A (en) 1986-06-10 1986-06-10 Driving controller for magnetic head

Country Status (1)

Country Link
JP (1) JPS62289904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08194903A (en) * 1995-01-13 1996-07-30 Nec Corp Data writing method and floppy disc apparatus utilizing the method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08194903A (en) * 1995-01-13 1996-07-30 Nec Corp Data writing method and floppy disc apparatus utilizing the method

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