JPS63122003A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS63122003A JPS63122003A JP61269095A JP26909586A JPS63122003A JP S63122003 A JPS63122003 A JP S63122003A JP 61269095 A JP61269095 A JP 61269095A JP 26909586 A JP26909586 A JP 26909586A JP S63122003 A JPS63122003 A JP S63122003A
- Authority
- JP
- Japan
- Prior art keywords
- head
- amplifier
- carriage
- reproducing
- magnetic 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
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Digital Magnetic Recording (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、デジタルデータの記録再生に利用するフレキ
シブルディスク駆動装置あるいは固定磁気ディスク駆動
装置等の磁気ディスク装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic disk device such as a flexible disk drive device or a fixed magnetic disk drive device used for recording and reproducing digital data.
従来の技術
磁気ディスク装置は、単一もしくは複数の磁気ヘッドを
有して、記録媒体に信号を記録再生する機能を有するが
、上記機能を実現するために以下第３図とともに説明す
るような電子回路系を具備している。A conventional magnetic disk device has a single or multiple magnetic heads and has the function of recording and reproducing signals on a recording medium.In order to realize the above function, an electronic Equipped with a circuit system.
即ち、第３図において、装置に入力されたデジタルデー
タは適当な信号処理回路１を通して記録増幅器２に印加
される。記録増幅器は電流信号の形態で磁気ヘッド３を
駆動し、記録を行なう。−方、磁気ヘッド３により誘起
された再生電圧は再生増幅器４により、増幅され、微分
器５及びコンパレータ６によシ、デジタル信号に変換さ
れ、適当な信号処理を施した後に、外部へ出力される。That is, in FIG. 3, digital data input to the apparatus is applied to a recording amplifier 2 through a suitable signal processing circuit 1. The recording amplifier drives the magnetic head 3 in the form of a current signal to perform recording. - On the other hand, the reproduction voltage induced by the magnetic head 3 is amplified by a reproduction amplifier 4, converted to a digital signal by a differentiator 5 and a comparator 6, and outputted to the outside after being subjected to appropriate signal processing. Ru.
一方、記録及び再生のモード切換７並びに、複数のヘッ
ドを有する場合はヘッド切換８を具備している。On the other hand, it is provided with a recording/reproducing mode switch 7 and a head switch 8 if it has a plurality of heads.
従来、特に、フレキシブルディスク駆動装置においては
、上述電子回路は一枚のプリント基板９上に集約して実
装され、磁気ヘッドの再生信号は導線により、上記電子
回路に接続されていた。又、一部の磁気ディスク装置で
はヘッドの近傍に、記録増幅器及び再生増幅器を実装し
た例があるが、この場合、単一の集積回路に複数のヘッ
ドから信号を導いており、導線の短縮化には限界があっ
た。Conventionally, particularly in flexible disk drives, the electronic circuits described above have been collectively mounted on a single printed circuit board 9, and the reproduction signal of the magnetic head has been connected to the electronic circuits through conductive wires. In addition, some magnetic disk drives have recording amplifiers and reproducing amplifiers mounted near the head, but in this case, signals are guided from multiple heads to a single integrated circuit, making it possible to shorten the conductor wire. had its limits.
発明が解決しようとする問題点
しかしながら、上記従来の磁気ディスク装置では、ヘッ
ドと電子回路間が比較的長距離の導線されているため、
この導線に雑音が侵入しやすいという問題点があった。Problems to be Solved by the Invention However, in the above-mentioned conventional magnetic disk drive, since the head and the electronic circuit are connected by a relatively long conductor,
There was a problem in that noise easily penetrated into this conducting wire.
特知、ヘッド出力は数ミリボルト程度の微小な電圧であ
り、わずかの雑音により大きく性能劣化を引きおこす恐
れがあった。The head output was a very small voltage of a few millivolts, so even the slightest noise could cause a significant deterioration in performance.
本発明はこのような従来の問題を解決するものであり、
雑音がヘッド信号に混入しにくい優れた磁気ディスク装
置を提供することを目的とするものである。The present invention solves these conventional problems,
It is an object of the present invention to provide an excellent magnetic disk device in which noise is less likely to be mixed into a head signal.
問題点を解決するだめの手段
本発明は上記目的を達成するために同一キャリッジ内に
、各々の磁気ヘッドに近接して再生増幅器から成る電子
回路を設けるようにしたものである。Means for Solving the Problems In order to achieve the above object, the present invention is such that an electronic circuit consisting of a regenerative amplifier is provided in the same carriage in the vicinity of each magnetic head.
作用
従って、本発明によれば、ヘッドと再生増幅器を接続す
る導線を極限まで短縮化できるため、微小電圧が伝送さ
れる区間が短かく、雑音の侵入が抑圧できるという効果
を有する。Therefore, according to the present invention, since the conductive wire connecting the head and the regenerative amplifier can be shortened to the utmost, the section over which a minute voltage is transmitted is short, and the intrusion of noise can be suppressed.
実施例
第１図は本発明の一実施例による磁気ディスク装置のブ
ロック図である。第１図は、フレキシブルディスク駆動
装置を例にとり示したものである。Embodiment FIG. 1 is a block diagram of a magnetic disk device according to an embodiment of the present invention. FIG. 1 shows a flexible disk drive device as an example.
第１図において、１１は磁気ヘッドであり、１２は再生
増幅器である。この再生増幅器１２は上記磁気ヘッド１
１を支持するヘッドキャリッジ１５上の各々のヘッド近
傍に実装されるものである。一方、１６は磁気ディスク
装置上に実装された主回路であり、この主回路系１６は
、少なくとも記録増幅器１３及び消去巻線駆動回路１４
及びヘッド選択回路１８を含み、必要に応じて磁気ディ
スク装置に必要な電子回路系を含むものである。In FIG. 1, 11 is a magnetic head, and 12 is a regenerative amplifier. This regenerative amplifier 12 is connected to the magnetic head 1.
1 is mounted near each head on a head carriage 15 that supports 1. On the other hand, 16 is a main circuit mounted on the magnetic disk device, and this main circuit system 16 includes at least a recording amplifier 13 and an erasing winding drive circuit 14.
and a head selection circuit 18, and, if necessary, an electronic circuit system necessary for the magnetic disk device.
上記構成において、再生増幅器１２はへッドキャリンジ
上に実装され、磁気ヘッドの近傍に配置される。複数の
へラドを有する場合は、各々のヘッドにこの再生増幅器
１２を一つずつ配する。このように複数の再生増幅器１
２を有する場合には、各々の再生増幅器１２を選択する
再生増幅器選択回路１７を主回路上に具備するものであ
る。上記実施例によれば、再生増幅器１３と磁気ヘッド
１１との導線を短縮することが可能であるから、雑音の
侵入を阻止することができる。通常、再生増幅器１２は
集積回路にて構成されるため、極めて小型の形態を実現
できる。従って、ヘッド近傍のへラドキャリッジ１５上
に実装することは可能である。In the above configuration, the regenerative amplifier 12 is mounted on the head carriage and placed near the magnetic head. When a plurality of heads are provided, one regenerative amplifier 12 is provided for each head. In this way, multiple regenerative amplifiers 1
2, a regenerative amplifier selection circuit 17 for selecting each regenerative amplifier 12 is provided on the main circuit. According to the embodiment described above, it is possible to shorten the conductor between the regenerative amplifier 13 and the magnetic head 11, so that it is possible to prevent noise from entering. Since the regenerative amplifier 12 is usually constructed from an integrated circuit, it can be made extremely compact. Therefore, it is possible to mount it on the helad carriage 15 near the head.
次に、第３図に第２の実施例の要部を示す。本実施例で
は、再生増幅器２１に加えて、記録増幅器２２及び消去
巻線駆動回路２３をもヘッドキャリッジ２４上の磁気ヘ
ッド２６近傍に配置している。この際、記録再生切換回
路２５も含まれるものである。一方、上記へンドキャリ
ンジとは異なる場所に固定され 。Next, FIG. 3 shows the main part of the second embodiment. In this embodiment, in addition to the reproducing amplifier 21, a recording amplifier 22 and an erasing winding drive circuit 23 are also arranged near the magnetic head 26 on the head carriage 24. At this time, a recording/reproduction switching circuit 25 is also included. On the other hand, it is fixed in a different location from the above-mentioned hend carriage.
た主回路系２７上には、少なくとも再生増幅器選択回路
２８を含む電子回路系が構成されている。本実施例では
、磁気ヘッド２６から直接、接続される回路系はすべて
ヘッドキャリッジ２４上に配置されており、すべてのヘ
ッドからの導線を短縮できるため上述の雑音低減効果は
更に大きくなる。一方、磁気ヘッド２６においては、消
去用巻線と記録再生用巻線とは異なるため、特に雑音に
敏感な記録再生巻線に接続される再生増幅器及び記録増
幅器をヘッドキャリフジ上に各々のヘッドについて配置
することも有用である。この場合、消去巻線、駆動回路
は主回路上に配置される。On the main circuit system 27, an electronic circuit system including at least a regenerative amplifier selection circuit 28 is constructed. In this embodiment, all the circuit systems directly connected to the magnetic head 26 are arranged on the head carriage 24, and the conductive wires from all the heads can be shortened, so that the above-mentioned noise reduction effect is further enhanced. On the other hand, in the magnetic head 26, since the erasing winding and the recording/reproducing winding are different, a reproducing amplifier and a recording amplifier connected to the recording/reproducing winding, which are particularly sensitive to noise, are mounted on the head carriage of each head. It is also useful to locate the In this case, the erase winding and drive circuit are placed on the main circuit.
発明の効果
本発明は上記実施例より明らかなように、各々のヘッド
に近接して再生増幅器を各々のヘッド毎に具備させるこ
とにより、雑音に敏感なヘッドと再生増幅器間の゛導線
を最短化できるという効果を有する。この結果、雑音に
対して安定に動作する磁気ディスク装置を提供できるも
のである。Effects of the Invention As is clear from the above embodiments, the present invention minimizes the length of the conductor between the head and the regenerative amplifier, which are sensitive to noise, by providing each head with a regenerative amplifier close to each head. It has the effect of being able to. As a result, it is possible to provide a magnetic disk device that operates stably against noise.
第１図は本発明の一実施例における磁気ディスク装置の
ブロック図、第２図は本発明の第２の実施例における磁
気ディスク装置のブロック図、第３図は従来の磁気ディ
スク装置のブロック図である。
１１．２６・・・磁気ヘッド、１２．２１・・・再生増
幅器、１３．２２・・・記録増幅器、１４．２３・・・
消去巻線駆動回路、１５．２４・・・ヘッドキャリッジ
、１６．２７・・・主回路系、１７．２８・・・再生増
幅器選択回路、１８・・・ヘッド選択回路、２５・・・
記録再生切換回路。
代理人の氏名 弁理士 中 尾 敏 男ほか１名第１図
第２図
区 ゛１FIG. 1 is a block diagram of a magnetic disk device according to an embodiment of the present invention, FIG. 2 is a block diagram of a magnetic disk device according to a second embodiment of the present invention, and FIG. 3 is a block diagram of a conventional magnetic disk device. It is. 11.26... Magnetic head, 12.21... Reproducing amplifier, 13.22... Recording amplifier, 14.23...
Erasing winding drive circuit, 15.24... Head carriage, 16.27... Main circuit system, 17.28... Regenerative amplifier selection circuit, 18... Head selection circuit, 25...
Recording/playback switching circuit. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 2 Ward ゛1
Claims (1)
のキャリッジに取り付けられ磁気ディスクに磁気記録再
生をさせる複数の磁気ヘッドと、このキャリッジに取り
付けられ上記磁気ヘッドのそれぞれの再生信号を増幅す
る複数の再生増幅器と、これら再生増幅器のそれぞれの
出力信号を入力していずれかひとつを選択してデジタル
データを出力する再生増幅器選択回路と、上記磁気ヘッ
ドのいずれかひとつを選択して、デジタルデータを上記
磁気ディスクに記録させ、上記トラックの周辺を消去さ
せるヘッド選択回路とを備えた磁気ディスク装置。A carriage that moves in the radial direction of a magnetic disk, a plurality of magnetic heads that are attached to this carriage to perform magnetic recording and reproduction on the magnetic disk, and a plurality of reproduction amplifiers that are attached to this carriage and amplify reproduction signals of each of the magnetic heads. a regenerative amplifier selection circuit which inputs the output signals of each of these regenerative amplifiers, selects one of them, and outputs digital data; and a regenerative amplifier selection circuit which selects one of the magnetic heads and outputs the digital data to the magnetic disk. and a head selection circuit for recording on the track and erasing the periphery of the track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61269095A JPS63122003A (en) | 1986-11-12 | 1986-11-12 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61269095A JPS63122003A (en) | 1986-11-12 | 1986-11-12 | Magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63122003A true JPS63122003A (en) | 1988-05-26 |
Family
ID=17467605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61269095A Pending JPS63122003A (en) | 1986-11-12 | 1986-11-12 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63122003A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0573809A (en) * | 1991-03-20 | 1993-03-26 | Tandberg Data As | Circuit device for selective coupling and penetrating transmission of read-out signal of multiple magnetic head in magnetic-layer memory |
-
1986
- 1986-11-12 JP JP61269095A patent/JPS63122003A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0573809A (en) * | 1991-03-20 | 1993-03-26 | Tandberg Data As | Circuit device for selective coupling and penetrating transmission of read-out signal of multiple magnetic head in magnetic-layer memory |
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