JPS63133303A - Recording system for flexible disk device - Google Patents
Recording system for flexible disk deviceInfo
- Publication number
- JPS63133303A JPS63133303A JP28050586A JP28050586A JPS63133303A JP S63133303 A JPS63133303 A JP S63133303A JP 28050586 A JP28050586 A JP 28050586A JP 28050586 A JP28050586 A JP 28050586A JP S63133303 A JPS63133303 A JP S63133303A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- current
- waveform
- medium
- switched
- 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
- 230000005415 magnetization Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10194—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using predistortion during writing
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (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、高記録密度を可能にするフレキシブルディス
ク装置の記録方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording method for a flexible disk device that enables high recording density.
（従来の技術）
従来、フレキシブルディスク装置は、一つの記録再生ヘ
ッドを用いて記録媒体を磁気的に充分飽和する記録磁界
を与える飽和記録方式が用いられていた。(Prior Art) Conventionally, flexible disk devices have used a saturation recording method in which a single recording/reproducing head is used to provide a recording magnetic field that magnetically saturates a recording medium sufficiently.
近年、増々要求されている高記録密度を達成するには、
再生時の千ヤツブロスを防ぐためにヘッドキャップ長を
狭くすることが必要である。このため、狭キャップ長ヘ
ッドを用いると、飽和記録を達成するために必要な、充
分な磁界が得にくくなる。また、高記録密度用媒体とし
て注目されるメタル媒体等では、Ｈｅが１５００［：Ｏ
ｅ）程度と非常に高いため、充分オーバーライドが得に
くい。さらに、垂直媒体として注目されるバリウムフェ
ライトもやはりオーバーライドが取りにくいという欠点
がある。In order to achieve the high recording density that has been increasingly demanded in recent years,
It is necessary to narrow the head cap length to prevent sloppy broth during playback. Therefore, when a narrow cap length head is used, it becomes difficult to obtain a sufficient magnetic field necessary to achieve saturation recording. In addition, in metal media, which is attracting attention as a medium for high recording density, He is 1500[:O
e) is extremely high, making it difficult to obtain a sufficient override. Furthermore, barium ferrite, which is attracting attention as a vertical medium, also has the disadvantage of being difficult to override.
このような間悄ヲ解決するだめの手段として、直流消去
を用いる方法が知られている。A method using direct current cancellation is known as a means to resolve such pauses.
第３図は、従来の記録方式を示した図である。FIG. 3 is a diagram showing a conventional recording method.
第３図において、（ａ）は書き込み電流、（ｂ）は媒体
上の磁化、（ｃ）は再生波形を示している。In FIG. 3, (a) shows the write current, (b) shows the magnetization on the medium, and (c) shows the reproduction waveform.
従来の方式では、直流消去ヘッドによる磁化（ｂ！ ）
と記録ヘッドによる磁化（ｂｚ）、（ｂｓ）の方向性に
より、再生波は（ａｔ）のように半値幅の広い波形であ
った。In the conventional method, magnetization (b!) by a DC erase head
Due to the directionality of magnetization (bz) and (bs) by the recording head, the reproduced wave had a waveform with a wide half-width as shown in (at).
（発明が解決しようとする問題点）
このように、従来の記録方式では、直流消去の磁化方向
と記録ヘッドによる磁化方向の組み合わせにより、媒体
上の磁化状態が異なり、良好な高記録密度用の波形が得
られなかった。(Problems to be Solved by the Invention) As described above, in the conventional recording method, the magnetization state on the medium differs depending on the combination of the magnetization direction of DC erasing and the magnetization direction of the recording head. No waveform was obtained.
本発明の目的は、磁化反転直後の記録電流を一定時間増
加し、その後定常′を流に切替えてキャップの広い直流
消去ヘッドで、一方向に飽和された媒体を狭キャップの
記録ヘッドを用いて記録するために発生する媒体上の磁
化の非対称を補正し、高記録密度を達成することができ
るフレキシブルディスク装置の記録方式を提供すること
にある。The object of the present invention is to increase the recording current for a certain period of time immediately after magnetization reversal, and then switch from a steady current to a current, and use a DC erase head with a wide cap to erase a unidirectionally saturated medium using a recording head with a narrow cap. An object of the present invention is to provide a recording method for a flexible disk device that can correct magnetization asymmetry on a medium that occurs during recording and achieve high recording density.
（問題点ｆ；ｃ解決するための手段）
前記目的を達成する九めに本発明によるフレキシブルデ
ィスク装置の記録方式は、直流消去ヘッドと記Ｓ再生ヘ
ッドを具備した７レギシグルデイスク装置において、前
記記録再生用ヘッド？用いてデータを記録するときに、
記録データに対応して媒体上の磁化を反転させるために
書き込み電流を切り換えた直後に、書き込みｔｉを一定
時間増加させた後、定常電流に切り換えるように構成さ
れている。(Means for Solving Problems f; c) Ninthly, the recording method of the flexible disk device according to the present invention to achieve the above-mentioned object is to solve the above-mentioned problems in a 7-register disk device equipped with a DC erasing head and a reproducing head. Recording/playback head? When recording data using
Immediately after switching the write current to reverse magnetization on the medium in accordance with recording data, the write current is increased for a certain period of time, and then switched to a steady current.
（実施例） 次に、本発明について、図面を参照して説明する。(Example) Next, the present invention will be explained with reference to the drawings.
第１図は、本発明の記録方式に使用される磁気ヘッドを
示した図、第２図は、本発明による記録方式を示した図
である。FIG. 1 is a diagram showing a magnetic head used in the recording method of the present invention, and FIG. 2 is a diagram showing the recording method according to the present invention.
第１図に示したヘッドは、直流消去ヘッド】と記録再生
用ヘッド２が、同一スライダ３に組み込まれており、フ
ロッピディスク媒体４に接触している。In the head shown in FIG. 1, a DC erasing head and a recording/reproducing head 2 are built into the same slider 3, and are in contact with a floppy disk medium 4.
第２図において、（ａ）は本発明の記録方式による書き
込み１！流、（ｂ）は媒体上の磁化、（ｃ）は再生波形
を示している。In FIG. 2, (a) shows writing 1! using the recording method of the present invention! (b) shows the magnetization on the medium, and (c) shows the reproduced waveform.
本発明による記録方式では、記録データに対応して媒体
上の磁化を反転させるため（（、書き込み電流（ａ）を
切り換えた直後に、書き込み電流（ａ）を一定時間増加
させた後、定常電流に切り換えている。このため、媒体
上の磁化（ｂ＊）。In the recording method according to the present invention, in order to reverse the magnetization on the medium in accordance with the recorded data ((, immediately after switching the write current (a), increase the write current (a) for a certain period of time, and then Therefore, the magnetization (b*) on the medium.
（ｂ３ ）のようになり、これに対応する再生波形は（
ａｔ）のように補正され、半値幅の狭い波形となり、（
ｅｘ）と（ｃ２）の波形はほぼ等しくなる。(b3), and the corresponding reproduced waveform is (
at), resulting in a waveform with a narrow half-width, and (
The waveforms of ex) and (c2) are approximately equal.
（発明の効果）
以上説明したように本発明によれば、記録電流を補正す
ることにより、直流消去ヘッドの影響をなくすことがで
き、半値巾の狭い波形が得られるので、高密度記録に適
し九波形を得ることができるという効果がある。(Effects of the Invention) As explained above, according to the present invention, by correcting the recording current, the influence of the DC erase head can be eliminated, and a waveform with a narrow half-width can be obtained, making it suitable for high-density recording. This has the effect that nine waveforms can be obtained.
第１図は本発明の記録方式に使用される磁気ヘッドを示
した図、第２図は本発明による記録方式分示し７＋、図
である。
第３図は従来の記録方式を示した図である。
ｌ・・・直流消去ヘッド
２・・・記録再生用ヘッド
３・・・スライダ
４・・Φフロッピディスク媒体
才１図
フロ・ノと°イイスクｄｆＡ
＜＝＝：（づヒ匁時動力向）
才？コ
（２ｚ）
汁３Ｌ屹FIG. 1 is a diagram showing a magnetic head used in the recording method of the present invention, and FIG. 2 is a diagram 7+ showing the recording method according to the present invention. FIG. 3 is a diagram showing a conventional recording method. l...DC erasing head 2...recording and reproducing head 3...slider 4...Φfloppy disk medium 1 figure flow no. ? Ko (2z) 3L soup
Claims (1)
ルディスク装置において、前記記録再生用ヘッドを用い
てデータを記録するときに、記録データに対応して媒体
上の磁化を反転させるために書き込み電流を切り換えた
直後に、書き込み電流を一定時間増加させた後、定常電
流に切り換えるように構成したことを特徴とするフレキ
シブルディスク装置の記録方式。In a flexible disk device equipped with a DC erasing head and a recording/reproducing head, when data is recorded using the recording/reproducing head, the write current is switched in order to reverse the magnetization on the medium in accordance with the recorded data. A recording method for a flexible disk device, characterized in that the write current is immediately increased for a certain period of time and then switched to a steady current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28050586A JPS63133303A (en) | 1986-11-25 | 1986-11-25 | Recording system for flexible disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28050586A JPS63133303A (en) | 1986-11-25 | 1986-11-25 | Recording system for flexible disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63133303A true JPS63133303A (en) | 1988-06-06 |
Family
ID=17626026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28050586A Pending JPS63133303A (en) | 1986-11-25 | 1986-11-25 | Recording system for flexible disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63133303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995035565A1 (en) * | 1994-06-17 | 1995-12-28 | Minnesota Mining And Manufacturing Company | Nrz magnetic recording |
-
1986
- 1986-11-25 JP JP28050586A patent/JPS63133303A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995035565A1 (en) * | 1994-06-17 | 1995-12-28 | Minnesota Mining And Manufacturing Company | Nrz magnetic recording |
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