JPS59142713A - Recording system of flexible disk device - Google Patents
Recording system of flexible disk deviceInfo
- Publication number
- JPS59142713A JPS59142713A JP1653283A JP1653283A JPS59142713A JP S59142713 A JPS59142713 A JP S59142713A JP 1653283 A JP1653283 A JP 1653283A JP 1653283 A JP1653283 A JP 1653283A JP S59142713 A JPS59142713 A JP S59142713A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- magnetic field
- core
- recording
- disk device
- 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
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
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
-
- 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
- G11B5/09—Digital recording
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/17—Construction or disposition of windings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Digital Magnetic Recording (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、フレキシブルディスク装置の記録方式に関
する。この発明になる記録方式によれば、従来の記録方
式に比べて再生波形の波形非対称が減少する。その結果
磁気ディスク装置のピットエラーレートが減少し、磁気
ディスク装置の１ｇ頼性が向上する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording method for a flexible disk device. According to the recording method of the present invention, the waveform asymmetry of the reproduced waveform is reduced compared to the conventional recording method. As a result, the pit error rate of the magnetic disk device is reduced, and the 1g reliability of the magnetic disk device is improved.
従来のフレキシブルディスク装置で用いられる磁気ヘッ
ドは、記録／再生用コアおよび消去コア（以後それぞれ
、Ｒ／ＷコアおよびＥコアと略称する）から構成されて
いる。第１図は、フレキシブルディスク装置に用いられ
ている磁気ヘッドのコアおよびコアに付いている巻線の
略図でるる。A magnetic head used in a conventional flexible disk device is composed of a recording/reproducing core and an erasing core (hereinafter abbreviated as an R/W core and an E core, respectively). FIG. 1 is a schematic diagram of the core of a magnetic head used in a flexible disk device and the winding attached to the core.
１はＲ／ Ｗコアである。Ｒ／ Ｗコア１はＲ／Ｗギャ
ップ２を有し、この部分で磁気記録媒体との間で情報の
記録、再生を行う。Ｒ／Ｗコア１には通常バンクバーと
称する閉磁気全構成する部品が存在する。Ｒ／ Ｗコア
１は配録再生用巻線（以後、Ｒ／ Ｗ巻線と略称する）
４を待つ。Ｒ／ Ｗ巻線４はセンタタッグ８、外部回路
との接続端子９．１０を持つ。４はＥコアである。Ｅコ
ア４はＥギャップ５をＭし、この部分で消去を行なう。1 is the R/W core. The R/W core 1 has a R/W gap 2, in which information is recorded and reproduced from a magnetic recording medium. The R/W core 1 includes a component that constitutes a closed magnetic field, usually called a bank bar. R/W core 1 is a recording/playback winding (hereinafter abbreviated as R/W winding)
Wait for 4. The R/W winding 4 has a center tag 8 and connection terminals 9 and 10 for connection to an external circuit. 4 is the E core. The E core 4 sets the E gap 5 to M and performs erasing at this portion.
Ｅコア４は消去用巻線（以後、３巻線と略称する）７を
持つ。８巻線７は外部回路との接続端子１１．１２を待
つ。消去は端子１１と１２の間に直流電流を通じて直流
砧界奮発生させることによって実行される。第２図は従
来の記録回路の一例でらる。記録データ信号１８はフリ
ップフロップ回Ｉｉ！ｉ１７によって１７２に分周され
て互いに逆相な信号を発生し、記録ゲート信号１９とＡ
ＮＤ回路１５．１６に入力され、ＡＮＤ回路１５．１６
の出力がドライバ１３．１４の入力となる。Ｒ／ Ｗ巻
＃乙のセンタタップ８ｖＣは正の直流電圧１１が印加さ
れてシシ、端子９，１０は抵抗１２を介してドライバ１
！ｌ、１４の出力に接続されでいる。２つのドライバ１
３．１４が交互にオンすることによって、センタタップ
８からドライバ１５．１４に電流が流れて、Ｒ／ Ｗ巻
線６は磁界全発生し、それによって記録が行なわれる。The E core 4 has an erasing winding (hereinafter abbreviated as 3rd winding) 7. 8 winding 7 waits for connection terminals 11, 12 with external circuits. Erasing is carried out by passing a direct current between terminals 11 and 12 to generate a direct current force. FIG. 2 shows an example of a conventional recording circuit. The recording data signal 18 is the flip-flop circuit Ii! The frequency is divided by i17 to 172 to generate signals with mutually opposite phases, and the recording gate signal 19 and A
Input to ND circuit 15.16, AND circuit 15.16
The output becomes the input of the driver 13.14. Positive DC voltage 11 is applied to center tap 8vC of R/W volume #B, and terminals 9 and 10 are connected to driver 1 through resistor 12.
! It is connected to the output of 1, 14. two drivers 1
3.14 are turned on alternately, current flows from the center tap 8 to the driver 15.14, and a full magnetic field is generated in the R/W winding 6, thereby recording.
記鍔動作中のほとんどの間Ｅ巻線７には電流が流れてお
シ、消去動作が実行されている。そのためＲ／ Ｗコア
１が記録動作をしている間、８巻線７が発生する直流磁
界がＲ／Ｗコ了１に及び、それに起因して再生波形には
波形非対称と呼ばれる現象が生じる。第３図は波形非対
称２説明している。第２図で、ドライバ１６０入力波形
がデユーティ比５０％の矩形波形２０である場合の再生
時におけるＲ ／ Ｗ巻線６の端子９．１０に誘起でれ
る再生電圧波形２１の一例である。再生電圧波形２１の
相隣るピークの間隔をそれぞれＴ１゜Ｔ２とした場合、
波形非対称が全くなければＴ、 １ ＝Ｔ ２であジ、
波形非対称があればＴ１笑Ｔ２である。第３図の再生波
形では波形非対称が生じておジ、ＴＩ＜Ｔ２となってい
るが、Ｔ１）Ｔ２となる逆の場合もおる。波形非対称の
大きさは一般に
Δ
ＰＳ＝ｌＴ１−Ｔ２１／２（ＴＩ＋Ｔ２）で与えられる
。ｐｓは波形非対称の尺度であり、Ｐａが大きい程辣形
非対称の置台が大きく、ＰＳなるのに従い、再生電圧波
形のピークの位置が正しい位置からずれる。その結果、
ピットエラーレートが増加する。従って波形非対称は小
さいことが望ましいのは周知の事実である。実験によれ
ば、波形非対称は、Ｅ巻線７ＶＣＲれる電流（以後、Ｅ
電流と略称する）の大きさにほぼ比例するという結果が
得られている。即ち、８巻約７で発生する直流磁界がＲ
／ Ｗコア１におよぶためである。During most of the recording operation, current flows through the E winding 7, and the erasing operation is being executed. Therefore, while the R/W core 1 is performing a recording operation, the DC magnetic field generated by the 8 windings 7 reaches the R/W core 1, which causes a phenomenon called waveform asymmetry in the reproduced waveform. FIG. 3 illustrates waveform asymmetry 2. FIG. 2 shows an example of a reproduction voltage waveform 21 induced at the terminals 9 and 10 of the R/W winding 6 during reproduction when the driver 160 input waveform is a rectangular waveform 20 with a duty ratio of 50%. When the interval between adjacent peaks of the reproduced voltage waveform 21 is respectively T1°T2,
If there is no waveform asymmetry, then T, 1 = T 2,
If there is waveform asymmetry, it is T1 and T2. In the reproduced waveform of FIG. 3, waveform asymmetry occurs and TI<T2, but there is also the opposite case where T1)T2. The magnitude of waveform asymmetry is generally given by ΔPS=lT1−T21/2(TI+T2). ps is a measure of waveform asymmetry; the larger Pa is, the larger the pedestal for the asymmetrical shape is, and as PS increases, the peak position of the reproduced voltage waveform deviates from the correct position. the result,
Pit error rate increases. Therefore, it is a well-known fact that it is desirable that the waveform asymmetry be small. According to experiments, waveform asymmetry is caused by the current flowing through E winding 7VCR (hereinafter E
The result was that it is approximately proportional to the magnitude of the current (abbreviated as current). That is, the DC magnetic field generated at approximately 7 turns of 8 is R
/ This is because it extends to W core 1.
コノ発明は、従来のフレキシブルディスク装置′の記録
方式が持つ以上の様な欠点を改良したフレキシブルディ
スク装置の記録方式全提供することを目的とする。The object of the present invention is to provide a complete recording system for a flexible disk device that improves the above-mentioned drawbacks of the conventional recording system for a flexible disk device.
以下、この発明の実施例全図面を参照しながら説明する
。Embodiments of the present invention will be described below with reference to all the drawings.
この発明の原理は記録時に８巻線７で発生する直Ｒｍ界
のうちでＲ／Ｗコア１におよぶ磁界を別のｉバ流磁界を
加えること（てよって打ち消すものである。第４図はこ
の発明の第１実施態様を示す略図である。Ｒ／ Ｗコア
１にＲ／ Ｗ巻線６に加えて補正用巻線２２が付加され
でいる。補正用巻線２２は外部回路との接続端子２５．
２４ｆ持つ。記録時に補正用巻線２２に亘Ｒ電流を流す
ことによって補正用巻ａ２２から直流磁界を発生させる
。発生式せる直流磁界はＲ／ Ｗギャップ２Ｖｃおいて
。The principle of this invention is to cancel the magnetic field that reaches the R/W core 1 out of the direct Rm field generated in the 8 windings 7 during recording by adding another i-current magnetic field (thereby canceling it out. This is a schematic diagram showing a first embodiment of the present invention.A correction winding 22 is added to the R/W core 1 in addition to the R/W winding 6.The correction winding 22 is connected to an external circuit. Terminal 25.
It has 24f. By passing an R current through the correction winding 22 during recording, a DC magnetic field is generated from the correction winding a22. The DC magnetic field to be generated is set at an R/W gap of 2Vc.
′−゛′で発生する磁界を打ち消すような方向と大きさ
を持つように設定する。第５図は、補正用巻線２２の駆
動回路１で含めた記録回路の一例を示すものである。第
５図の回路は、第２図の回路にドライバ２６゜抵抗２５
が付加されている。補正層巻ａ２ニア１７）端子２４Ｖ
ｃｉｄ、正の＋ａＲＮ圧１１圧印１されており、端子２
３は抵抗２５を介してドライバ２６に接続されている。It is set so that it has a direction and magnitude that cancels the magnetic field generated at ′−゛′. FIG. 5 shows an example of a recording circuit included in the drive circuit 1 for the correction winding 22. In FIG. The circuit in Figure 5 is the same as the circuit in Figure 2 with a driver 26° and a resistor 25.
is added. Correction layer winding a2 near 17) terminal 24V
cid, positive +aRN pressure 11 coined 1, terminal 2
3 is connected to a driver 26 via a resistor 25.
ドライバ２６は記録時にオンして、補正用巻線２２に直
流電流を流す。発生する磁界の大きさは、抵抗２５はよ
って制御される。発生する磁界の方向を逆にする時は端
子２３に正の直流電圧全印加し、端子２４を抵抗２５に
接続すればよい。The driver 26 is turned on during recording and causes a direct current to flow through the correction winding 22. The magnitude of the generated magnetic field is controlled by the resistor 25. To reverse the direction of the generated magnetic field, it is sufficient to apply the full positive DC voltage to the terminal 23 and connect the terminal 24 to the resistor 25.
以上の説明では、Ｒ／ Ｗ％線としてセンタタップのあ
るＲ／Ｗ巻ｆｆＭ’ｉ例にとって説明したが、セに補正
用巻線２２を付加して、それに直流磁界を発生させて８
巻線が発生する直流磁界の影響を打ち消すことができる
。In the above explanation, the R/W winding ffM'i with a center tap was used as the R/W % line.
The influence of the DC magnetic field generated by the windings can be canceled out.
この発明に係るフレキシブルディスク装置の記録方式に
よれば、記録時ＫＲ／Ｗコア１のｒｔ ／ ｗギャップ
２におよぶ８巻線７が発生する直流磁界を打ち消すこと
ができる。その結果、再生時に波形非対称が減少する。According to the recording method of the flexible disk device according to the present invention, the DC magnetic field generated by the eight windings 7 spanning the rt/w gap 2 of the KR/W core 1 during recording can be canceled out. As a result, waveform asymmetry is reduced during playback.
従って、従来の記録方式に比べて、ビットエラーレート
が減少し、装置の信頼性が向上する。Therefore, compared to conventional recording methods, the bit error rate is reduced and the reliability of the device is improved.
第１図は従来のフレキシブルディスク装置で用いられる
８気ヘッドのコアおよびＲ／ Ｗ巻線、８巻線の略図、
第２図は従来の記録回路、第５図は波形非対称が生じて
いる再生波形、第４図はこの発明の第１実施態様の実施
例、第５図はこの発明の第１英施態様の回路１で含めた
実施例でめる。
１・・・・・・Ｒ／Ｗコア ２・・・・・・Ｒ，／Ｗ
ギャップ４・・・・・・Ｅコア ５・・・・・・
Ｅギャップ６・・・・・・Ｒ／ Ｗ巻線 ７・・・・
・・Ｅ巻線１２．２５・・・・・・抵 抗
１３．１４．２６・・・・・・ドライバ１７・・・・・
・フリップフロップ回路２２・・・・・・補正用巻線
第３図Figure 1 is a schematic diagram of the core, R/W winding, and 8 windings of an 8-air head used in a conventional flexible disk device.
FIG. 2 shows a conventional recording circuit, FIG. 5 shows a reproduced waveform with waveform asymmetry, FIG. 4 shows an example of the first embodiment of the present invention, and FIG. 5 shows an example of the first embodiment of the invention. The example is included in Circuit 1. 1...R/W core 2...R,/W
Gap 4... E core 5...
E gap 6...R/W winding 7...
...E winding 12.25...Resistance 13.14.26...Driver 17...
・Flip-flop circuit 22...Correction winding Figure 3
Claims (1)
の磁気ヘッドＲ／ ＷコアＣＩＩＫ記録時に直流磁界を
与える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。 （２）磁気ヘッド（Ｄ Ｒ／Ｗ ：Ｉ 了（ＩＩＫ Ｒ
／Ｗ巻線（６）とは別に巻線（２２）を付加して、記録
時には巻線（２２）に直流電流を流すことによってＲ／
Ｗコア（１）に直流磁界を与える、特許請求の範−第１
項記載のフレキシブルディスク装置の記録方式。[Claims] (IIE: Magnetic head for a flexible disk device having 7A(4) R/W core CIIK A recording method for a flexible disk device characterized by applying a DC magnetic field during recording. (2) Magnetic head (D R/W: I completed (IIK R
A winding (22) is added separately from the /W winding (6), and a DC current is passed through the winding (22) during recording.
Claim 1, which applies a DC magnetic field to the W core (1)
Recording method of the flexible disk device described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1653283A JPS59142713A (en) | 1983-02-03 | 1983-02-03 | Recording system of flexible disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1653283A JPS59142713A (en) | 1983-02-03 | 1983-02-03 | Recording system of flexible disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59142713A true JPS59142713A (en) | 1984-08-16 |
Family
ID=11918872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1653283A Pending JPS59142713A (en) | 1983-02-03 | 1983-02-03 | Recording system of flexible disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59142713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122802A (en) * | 1989-10-05 | 1991-05-24 | Internatl Business Mach Corp <Ibm> | Magnetic head device |
| JPH04125802A (en) * | 1990-09-18 | 1992-04-27 | Alps Electric Co Ltd | Magnetic recorder |
-
1983
- 1983-02-03 JP JP1653283A patent/JPS59142713A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122802A (en) * | 1989-10-05 | 1991-05-24 | Internatl Business Mach Corp <Ibm> | Magnetic head device |
| JPH04125802A (en) * | 1990-09-18 | 1992-04-27 | Alps Electric Co Ltd | Magnetic recorder |
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