JPS6196576A - Magnetic recording device - Google Patents

Magnetic recording device

Info

Publication number
JPS6196576A
JPS6196576A JP21803584A JP21803584A JPS6196576A JP S6196576 A JPS6196576 A JP S6196576A JP 21803584 A JP21803584 A JP 21803584A JP 21803584 A JP21803584 A JP 21803584A JP S6196576 A JPS6196576 A JP S6196576A
Authority
JP
Japan
Prior art keywords
track
magnetic
reproduction
signal
recording 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
Application number
JP21803584A
Other languages
Japanese (ja)
Inventor
Yoichi Murakami
洋一 村上
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP21803584A priority Critical patent/JPS6196576A/en
Publication of JPS6196576A publication Critical patent/JPS6196576A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To highly concentrate tracks without a special servo signal by providing a track servo mechanism employing the difference signal of reproduction outputs of a magnetic head where one track is bisected in the track width direction and a read circuit using a sum signal. CONSTITUTION:When windings 3 and 4 are installed on magnetic cores 1 and 2 are a write current is flowed in coils 3 and 4, magnetizations 6 and 7 in the same direction are caused on a magnetic medium 9. When a track is in the state of off-track by DELTAT at reproduction, in case of the figure, the core 1 is positioned at approximately entire magnitizations 6 and 7 of all track width, whereas some part of the core 2 is positioned in a non-magnetized area. As a result, the output of the coil 3 differs from that of the coil 4, whereby the servo mechanism can be equipped so as to make the output difference zero. The cores 1 and 2 are driven and controlled to adjust the off-track, and therefore sum signals of the coils 3 and 4 can be taken out as reproduction data. Thus, the highly concentrated tracks without using a special servo signal are obtained.

Description

【発明の詳細な説明】 発明の属する技術分野 本発明は、磁気記録装置に関し、特に、磁気記録装置の
トラックサーボの方式に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording device, and more particularly to a track servo system for a magnetic recording device.

従来の技術 従来、磁気記録装置で高トラツク密度化する場合には、
特別なサーボパターンを磁気記録媒体に書込み、サーボ
情報としている。しかしながら。Conventional technology Conventionally, when increasing track density in a magnetic recording device,
A special servo pattern is written on a magnetic recording medium as servo information. however.

サーボパターンを書込むために実際に使用できるデータ
部の割合は低下してしまっていた。The ratio of the data section that can actually be used to write servo patterns has decreased.

発明の目的 本発明は従来の上記事情に鑑みてなされたものであり、
従って本発明の目的は、トラックサーボ用の特別なサー
ボパターンを用いずに通常のデータを用い、トラック幅
方向に２分割され九侮気へ、ラドの読み出し盾号の出力
差が最小となる様にトラック位置を微調整することによ
りトラックサーボを行い更に２つのヘッドの和は号をデ
ータとして用いることによって、オフトラックを最小と
した状態での再生出力を得ることができる新規な磁気記
録装置を提供することにある。Purpose of the Invention The present invention has been made in view of the above-mentioned conventional circumstances.
Therefore, an object of the present invention is to use normal data without using a special servo pattern for track servo, to divide the track into two in the width direction, and to minimize the difference in the output of the RAD readout signal. By fine-tuning the track position to perform track servo, and by using the sum of the two heads as data, we have created a new magnetic recording device that can obtain playback output with minimal off-track. It is about providing.

発明の構成 上記目的を達成する為に１本発明に係る磁気記録装置は
、磁気記録装置の磁気ヘッドとして１つのトラックをト
ラック幅方向に２分割されたヘッドを備え、かつ該２分
割された両ヘッドの再生出力の差信号を用いたトラック
サーボ機構と、前記両ヘッドの再生出力の和信号を用い
た読み出し回路とを具備して構成される。SUMMARY OF THE INVENTION In order to achieve the above objects, a magnetic recording device according to the present invention includes a head in which one track is divided into two in the track width direction as a magnetic head of the magnetic recording device; The apparatus includes a track servo mechanism that uses a difference signal between reproduction outputs of the heads, and a readout circuit that uses a sum signal of reproduction outputs of both heads.

即ち１本発明に係る磁気記録装置は、磁気ヘツドとして
トラック幅方向に２分割したヘッドを用い、特別なサー
ボパターンを用いずに適状の再生出力の差信号を用いて
サーボを行い１両君号の和信号を用いて読み出しデータ
とするととを特徴とする。That is, the magnetic recording device according to the present invention uses a head divided into two in the track width direction as a magnetic head, and performs servo using a differential signal of an appropriate reproduction output without using a special servo pattern. The present invention is characterized in that the sum signal of the number is used as read data.

発明の実施例 以下本発明をその好ましｒ−実施例について図面を参照
しながら具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

第１図に本発明の第１の実―例を示す。FIG. 1 shows a first practical example of the present invention.

本発明の一実檜例による構成としては、２つの磁性コア
（ヘッド）１，２を有し、該２つの磁気コア１．２にそ
れぞれ巻線３．４が抱こされている。巻線（コイル）３
．４に書込み電流を流すことにより、磁性媒体９上に６
．７に示す様に同方向の磁化を行うことができる。The structure according to the solid cypress example of the present invention has two magnetic cores (heads) 1 and 2, and windings 3.4 are wrapped around each of the two magnetic cores 1.2. Winding (coil) 3
．． 6 on the magnetic medium 9 by applying a write current to 4.
．． As shown in 7, magnetization in the same direction can be performed.

次に再生時の一例を第２図によシ説明する。第２図に示
す例ではΔＴだけオフトラックしている。Next, an example of reproduction will be explained with reference to FIG. In the example shown in FIG. 2, the track is off-track by ΔT.

この場合に磁性コア１はほぼ全トラック幅磁化６．７上
に位置しているが磁性；７２は一部が未磁化領域上に位
置している。この結果、コイル３．４の出力に差が生じ
る。図示されていないサーボ壜構はこの出力差が零とな
る様にサーボを行い、コア１．２を駆動、制御し、オフ
トラックを調整する。さらに、コイル３，４の終端には
軌み出し回路（図示せず）が設けられておシ、コイル３
．４の和信号を再生データとして用いる。ここで、コア
１．２間の干渉を防ぐために、コア１と２の間の部分（
磁気シールド部）８は非磁性、高電導度の材料を使用す
るのが有効である。In this case, the magnetic core 1 is located on substantially the entire track width magnetization 6.7, but the magnetic core 1 is located partially on the unmagnetized region. This results in a difference in the output of the coils 3.4. A servo bottle structure (not shown) performs servo so that this output difference becomes zero, drives and controls the core 1.2, and adjusts off-track. Furthermore, a track setting circuit (not shown) is provided at the ends of the coils 3 and 4.
．． The sum signal of 4 is used as reproduction data. Here, in order to prevent interference between cores 1 and 2, the part between cores 1 and 2 (
It is effective to use a non-magnetic, highly conductive material for the magnetic shield portion (8).

第３図は本発明の第２の実権例を示す斜視図でるる。本
実検測は高トラツク密度（ＴＰＩ）の磁気記録装置に本
発明を適用した場合の例である。図において、参照番号
１１．１２Ｎ磁性コア、１３．１４は巻線（コイル）、
１５はＲ／Ｗ　ＧＡＰ部、１６．１７は媒体上の磁化、
１８は磁気シールド部、１９は磁性媒体をそれぞれ示す
。動作は上記第１の実権例とほぼ同様であるからその説
明を省略する。FIG. 3 is a perspective view showing a second practical example of the present invention. This actual measurement is an example in which the present invention is applied to a high track density (TPI) magnetic recording device. In the figure, reference number 11.12N magnetic core, 13.14 winding (coil),
15 is the R/W GAP part, 16.17 is the magnetization on the medium,
Reference numeral 18 indicates a magnetic shield section, and reference numeral 19 indicates a magnetic medium. The operation is almost the same as that of the first real power example, so the explanation thereof will be omitted.

発明の効果 本発明は、以上の様に、２分割したヘッドを用いること
により、特別なサーボ信号を用いずに高トラツク密度（
ＴＰＩ）化が可能となる。Effects of the Invention As described above, the present invention uses a head divided into two parts to achieve high track density (without using special servo signals).
TPI).

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

第１図は本発明に係る第１の実権例を示す概略斜視図、
第２図は第１の実権例の動作を説明する為の図、第３図
は本発明の第２の実施例を示す斜視図である。 １．２，１１，１２・・・磁性コア、３．４．１３゜１
４＊＠ｓ：ｆイル、５．１５−−−几／Ｗ　ＧＡＰ　ｍ
　、　　６゜７．１６％１７・・拳媒体上の磁化、８．
１８・・拳磁気シールド、９，１９・・・磁性媒体 特許出願人　　　日本電気株式会社 代　理　人　　　弁理士　熊谷雄太部 ｉｔつｌ可FIG. 1 is a schematic perspective view showing a first practical example according to the present invention;
FIG. 2 is a diagram for explaining the operation of the first practical example, and FIG. 3 is a perspective view showing the second embodiment of the present invention. 1.2,11,12...Magnetic core, 3.4.13゜1
4*@s:f il, 5.15---几/W GAP m
, 6°7.16%17... Magnetization on the fist medium, 8.
18...Fist magnetic shield, 9,19...Magnetic media patent applicant NEC Corporation Representative Patent attorney Yutabe Kumagai

Claims (1)

【特許請求の範囲】[Claims] 磁気記録装置の磁気ヘッドとして１つのトラックをトラ
ック幅方向に２分割されたヘッドを備えかつ該２分割さ
れた両ヘッドの再生出力の差信号を用いたトラックサー
ボ機構と、前記両ヘッドの再生出力の和信号を用いた読
み出し回路とを具備することを特徴とした磁気記録装置
。A track servo mechanism comprising, as a magnetic head of a magnetic recording device, a head in which one track is divided into two in the track width direction, and using a difference signal between the reproduction outputs of the two divided heads, and the reproduction output of the two heads. What is claimed is: 1. A magnetic recording device comprising: a readout circuit using a sum signal of
JP21803584A 1984-10-17 1984-10-17 Magnetic recording device Pending JPS6196576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21803584A JPS6196576A (en) 1984-10-17 1984-10-17 Magnetic recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21803584A JPS6196576A (en) 1984-10-17 1984-10-17 Magnetic recording device

Publications (1)

Publication Number Publication Date
JPS6196576A true JPS6196576A (en) 1986-05-15

Family

ID=16713617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21803584A Pending JPS6196576A (en) 1984-10-17 1984-10-17 Magnetic recording device

Country Status (1)

Country Link
JP (1) JPS6196576A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265665A2 (en) * 1986-10-27 1988-05-04 International Business Machines Corporation Twin track magnetic data read-write head improving track misregistration effects in twin track vertical recording
US5257148A (en) * 1989-05-30 1993-10-26 Tandberg Data As Method and apparatus for positioning a magnetic head in a magnetic layer memory system using tracking by reading a spaced pair of corresponding subtracks
US20140085751A1 (en) * 1999-12-30 2014-03-27 Advanced Research Corporation Method of making a multi-channel time based servo tape media

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5671A (en) * 1979-06-14 1981-01-06 Fujitsu Ltd Self tracking system for magnetic disc unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5671A (en) * 1979-06-14 1981-01-06 Fujitsu Ltd Self tracking system for magnetic disc unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265665A2 (en) * 1986-10-27 1988-05-04 International Business Machines Corporation Twin track magnetic data read-write head improving track misregistration effects in twin track vertical recording
US5257148A (en) * 1989-05-30 1993-10-26 Tandberg Data As Method and apparatus for positioning a magnetic head in a magnetic layer memory system using tracking by reading a spaced pair of corresponding subtracks
US20140085751A1 (en) * 1999-12-30 2014-03-27 Advanced Research Corporation Method of making a multi-channel time based servo tape media

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