JPH01227202A - Magnetic recorder - Google Patents

Abstract

PURPOSE:To optimize the setting of a writing current on inner and outer circumferences by inner-outer-circumference-switching the writing current of heads, which are arranged by being shifted to each other by several tracks on both the sides of a magnetic recording medium, on a track on the same circumference of both the sides of the magnetic recording medium. CONSTITUTION:A head 1 on a side 0 or a head 2 on a side 1 is selected by a head switching circuit 3 from a side switching signal 12. Next, whether the respective heads 1 and 2 are on the inner circumference or the outer circumference is given as an inner-outer-circumference switching signal 13 from a track counter to a writing current source 7 by the side switching signal 12, a step signal 9, a track 00 signal 10, and the information about the positions of the head 1 and 2 of a direction signal 11. The writing current is set in the current source 7 by this signal 13, the writing current is supplied to a writing circuit 4, further, a writing signal 16 is divided by a T-FF 5, this signal switches the writing current in the writing circuit 4, and the current flows into the selected head 1 or 2 through a head switching circuit 3.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フロッピディスク等の磁気記録媒体に情報
信号を記録、再生することが可能な磁気記録装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording device capable of recording and reproducing information signals on a magnetic recording medium such as a floppy disk.

〔従来の技術〕[Conventional technology]

第４図は従来の磁気記録装置を示す構成図である。図に
おいて、１はサイド０側ヘツド、２はサイド１側ヘツド
、３はへラド１．２を切替えるヘッド切替え回路、４は
上記ヘッド１，２に書込み電流を流す書込み回路、５は
この書込み回路４に接続されたトリガフリップフロップ
（以下Ｔ−ＦＦと称す）、６は上記Ｔ−ＦＦ５に入力さ
れる書込み信号、７は上記書込み回路４に供給する書込
み電流源、８は上記ヘッド１，２の位置情報を知るトラ
ックカウンタ、９はステップ信号、１０は上記ヘッド１
．２がトラック００にあることを知らせるトランクＯＯ
信号、１１は上記ヘッド１゜２の移動方間を示すディレ
クション信号、１２はヘッド１，２を選択し、ヘッド切
替え回路３にサイドの切替え情報を与えるサイド切替え
信号、１３は上記ヘッド１，２が内周にあるか外周にあ
るかを示す内外周切替え信号である。FIG. 4 is a block diagram showing a conventional magnetic recording device. In the figure, 1 is a head on the side 0 side, 2 is a head on the side 1 side, 3 is a head switching circuit that switches between the heads 1 and 2, 4 is a write circuit that supplies a write current to the heads 1 and 2, and 5 is this write circuit. 4 is connected to a trigger flip-flop (hereinafter referred to as T-FF); 6 is a write signal input to the T-FF 5; 7 is a write current source that supplies the write circuit 4; 8 is a write current source connected to the heads 1 and 2; 9 is a step signal, 10 is a track counter that knows the position information of head 1.
．． Trunk OO indicating that 2 is in truck 00
11 is a direction signal indicating the moving direction of the heads 1 and 2; 12 is a side switching signal that selects heads 1 and 2 and provides side switching information to the head switching circuit 3; 13 is a direction signal that indicates the direction of movement of the heads 1 and 2; This is an inner/outer periphery switching signal indicating whether it is on the inner periphery or on the outer periphery.

第３図は上記ヘッド１．２の断面図を示す。図において
、１４は磁気記録媒体、１５はサイド１側のヘッドピー
ス、１６はサイド１側のスライダ、１７はサイド１側の
イレーズヘッド、１８はサイド１側のリード／ライトヘ
ッド、１９はサイド０側のへノドピース、２０はサイド
０側のスライダ、２１はサイドＯ側のイレーズヘッド、
２２はサイド０側のリード／ライトヘッド、２３は上記
り−ド／ライトヘッド１８．２２によってデータが書込
まれるトラックである。FIG. 3 shows a sectional view of the head 1.2. In the figure, 14 is a magnetic recording medium, 15 is a head piece on side 1, 16 is a slider on side 1, 17 is an erase head on side 1, 18 is a read/write head on side 1, and 19 is a side 0 side. side hendo piece, 20 is the slider on the side 0 side, 21 is the erase head on the side O side,
22 is a read/write head on the side 0 side, and 23 is a track on which data is written by the read/write head 18 and 22.

第５図は書込みを行う場合の各部の波形図である。FIG. 5 is a waveform diagram of each part when writing is performed.

次に動作について説明する。まず、サイド切替え信号１
２からヘッド切替え回路３によりサイド０側のヘッド１
もしくはサイド１側のヘッド２が選択される。次にステ
ップ信号９．トラック００信号１０．ディレクション信
号１１からなるヘッド１．２の位置情報により、トラッ
クカウンタ８から内周にあるか外周にあるかが、内外周
切替え信号１３として書込み電流源７に与えられる。こ
の内外周切替え信号１３により書込み電流源７で内、外
周に応じた書込み電流が設定され、書込み回路４に書込
み電流が供給される。さらに書込み信号６がＴ−ＦＦ５
により分周され、この信号が書込み回路４で書込み電流
をスイッチングし、ヘッド切替え回路３を通り、選択さ
れたヘッド１もしくは２に電流が流れる。この場合、第
５図に示すように、サイド切替え信号１２が“Ｈ”でも
“Ｌ”でも内外周切替え信号１３はトラックｍで状態が
変わる。また、第３図のヘッドの断面図のように、サイ
ド０側とサイド１側とでリード／ライトヘッド１８．２
２の位置がヘッド相互の干渉を防ぐために、ずれている
ので、書込み電流の内外周切替えを第５図に示すタイム
チャートのようにトランクｍで行うとサイドＯ側とサイ
ド１側で数トラック分ずれた位置で書込み電流が切替わ
る。Next, the operation will be explained. First, side switching signal 1
2 to head 1 on side 0 by head switching circuit 3.
Alternatively, head 2 on side 1 is selected. Next, step signal 9. Track 00 signal 10. Based on the positional information of the head 1.2 formed by the direction signal 11, whether the head 1.2 is on the inner or outer circumference is provided from the track counter 8 to the write current source 7 as an inner/outer circumference switching signal 13. The write current source 7 sets a write current according to the inner and outer circumferences according to the inner/outer circumference switching signal 13, and the write current is supplied to the write circuit 4. Furthermore, write signal 6 is T-FF5
This signal switches the write current in the write circuit 4, passes through the head switching circuit 3, and the current flows to the selected head 1 or 2. In this case, as shown in FIG. 5, whether the side switching signal 12 is "H" or "L", the state of the inner/outer periphery switching signal 13 changes at track m. In addition, as shown in the cross-sectional view of the head in FIG. 3, the read/write head 18.2 is
Since the positions of the heads 2 and 2 are shifted to prevent mutual interference between the heads, if the write current is switched between the inner and outer circumferences at the trunk m as shown in the time chart shown in Fig. 5, several tracks will be generated on the side O side and the side 1 side. The write current is switched at the shifted position.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の磁気記録装置は以上のように構成されているので
、書込み電流の内外周切替えが磁気記録媒体の表裏の同
一円周上で行うことができず、内外周の書込み電流設定
に数トラック分のマージンを見込まなければならず、内
外周の書込み電流を最適に設定できないなどの問題点が
あった。Since conventional magnetic recording devices are configured as described above, it is not possible to switch the write current between the inner and outer circumferences on the same circumference on the front and back sides of the magnetic recording medium, and it takes several tracks to set the write current on the inner and outer circumferences. Therefore, there were problems such as the inability to optimally set the write currents for the inner and outer circumferences.

この発明は上記のような問題点を解消するためになされ
たもので、書込み電流の内外周切替えを磁気記録媒体の
表裏の同一円周上でできる磁気記録装置を得ることを目
的とする。The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a magnetic recording device in which a write current can be switched between the inner and outer circumferences on the same circumference on the front and back sides of a magnetic recording medium.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る磁気記録装置は、書込み電流の内外周切
替えを行う信号を、磁気記録媒体の表裏でヘッドがずれ
ているトラック数分ずらして発生するようにしたもので
ある。The magnetic recording device according to the present invention generates a signal for switching the write current between the inner and outer circumferences by shifting the number of tracks where the head is misaligned on the front and back sides of the magnetic recording medium.

〔作用〕[Effect]

この発明においては、磁気記録媒体の表裏でへ・ノドが
ずれているトラック数分だけ書込み電流の内外周切替え
信号をずらして発生するようにしたので、磁気記録媒体
の表裏の同一円周上で書込み電流の内外周切替えができ
る。In this invention, since the inner and outer circumference switching signals of the write current are generated by shifting them by the number of tracks where the front and back edges are shifted on the front and back sides of the magnetic recording medium, Write current can be switched between inner and outer circumferences.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第１
図は本発明の一実施例による磁気記録装置を示し、図に
おいて、１はサイドＯ側ヘッド、２はサイド１側ヘツド
、３は上記のヘッド１，２を切替えるヘッド切替え回路
、４はヘッド１．２に書込み電流を流す書込み回路、５
はこの書込み回路４に接続されたＴ−ＦＦ、６は上記Ｔ
−ＦＦ５に入力される書込み信号、７は上記書込み回路
４に供給する書込み電流源、８は上記ヘッド１゜２の位
置情報を知るトラックカウンタ、９はステップ信号、１
０は上記ヘッド１，２がトラックＯＯにあることを知ら
せるトラックＯＯ信号、１１は上記ヘッド１，２の移動
方向を示すディレクション信号、１２はヘッド１，２を
選択し、ヘッド切替え回路３とトラックカウンタ８にサ
イドの切替え情報を与えるサイド切替え信号、１３は上
記ヘッド１，２が内周にあるか外周にあるかを示す内外
周切替え信号である。An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a magnetic recording device according to an embodiment of the present invention. In the figure, 1 is a head on the side O side, 2 is a head on the side 1 side, 3 is a head switching circuit for switching between the heads 1 and 2, and 4 is a head 1 side head. .2 a write circuit that supplies a write current to 5;
is the T-FF connected to this write circuit 4, and 6 is the T-FF connected to the write circuit 4.
- A write signal input to the FF 5, 7 a write current source that supplies the write circuit 4, 8 a track counter that knows the position information of the head 1°2, 9 a step signal, 1
0 is a track OO signal that informs that the heads 1 and 2 are on track OO, 11 is a direction signal that indicates the moving direction of the heads 1 and 2, and 12 is a direction signal that selects heads 1 and 2 and switches between the head switching circuit 3 and the track. A side switching signal 13 provides side switching information to the counter 8, and an inner/outside switching signal 13 indicates whether the heads 1 and 2 are located on the inner or outer periphery.

第２図は書込み時の内外周切替え状態を示す波形図であ
る。FIG. 2 is a waveform diagram showing the switching state between the inner and outer circumferences during writing.

次に動作について説明する。まず、サイド切替え信号１
２からヘッド切替え回路３によりサイド１側ヘツド１も
しくはサイド１側ヘツド２が選択される。次に上記サイ
ド切替え信号１２．ステップ信号９．トランクＯＯ信号
１０．ディレクション信号１１のヘッド１，２の位置情
報によりトランクカウンタ８からそれぞれのヘッド１．
２が内周にあるか外周にあるかが、内外周切替え信号１
３として書込み電流源７に与えられる。この内外周切替
え信号１３により書込み電流源７で書込み電流が設定さ
れ、書込み回路４に書込み電流が供給される。さらに書
込み信号１６がＴ−ＦＦ５により分周され、この信号が
書込み回路４で書込み電流をスイッチングし、ヘッド切
替え回路３を通り、選択されたヘッド１もしくは２に電
流が流れる。Next, the operation will be explained. First, side switching signal 1
2, the head switching circuit 3 selects the side 1 side head 1 or the side 1 side head 2. Next, the side switching signal 12. Step signal 9. Trunk OO signal 10. Based on the position information of the heads 1 and 2 of the direction signal 11, the trunk counter 8 records each head 1.
Whether 2 is on the inner or outer circumference is determined by the inner/outer circumference switching signal 1.
3 to the write current source 7. A write current is set by the write current source 7 based on this inner/outer circumference switching signal 13, and the write current is supplied to the write circuit 4. Furthermore, the write signal 16 is frequency-divided by the T-FF 5, this signal switches the write current in the write circuit 4, passes through the head switching circuit 3, and the current flows to the selected head 1 or 2.

ここで第３図のヘッドの断面図のように、サイド０側と
サイド１側でリード／ライトベンド１８゜２２がヘッド
相互の干渉を防ぐために４トラック分ずれている時には
第２図に示すタイムチャートのようにサイド０側で書込
み電流の内外周切替えをトラックｍで行い、サイド１側
ではトラックｍ十４で行えばよ（、こうすることにより
磁気記録媒体は表裏同一のトラックで書込み電流の内外
周切替えを行なうことができ、内外周の書込み電流の最
適設定が可能になる。Here, as shown in the cross-sectional view of the head in Figure 3, when the read/write bends 18°22 on side 0 and side 1 are shifted by 4 tracks to prevent interference between the heads, the time shown in Figure 2 As shown in the chart, the write current can be switched between the inner and outer circumferences on side 0 at track m, and on side 1 at track m14. It is possible to switch between the inner and outer circumferences, making it possible to optimally set the write current for the inner and outer circumferences.

なお、上記実施例では第３図のように、サイド０と１で
４トランク分リード／ライトヘッドがずれているものに
ついて示したが、４トラック分以外のずれであっても勿
論よい。In the above embodiment, as shown in FIG. 3, the read/write head is deviated by 4 trunks between sides 0 and 1, but it is of course possible to deviate by other than 4 tracks.

また、上記実施例では書込み電流切替えを内周と外周の
２段としているものを示したが、２段以上としてもよく
上記実施例と同様の効果を奏する。Furthermore, in the above embodiment, the write current is switched in two stages, one on the inner circumference and one on the outer circumference, but it is also possible to use two or more stages to achieve the same effect as in the above embodiment.

更に、上記実施例では情報信号の記録のみを行なうもの
についてのみ説明したが、情報信号の記録、再生を行な
う磁気記録再生装置についても当然適用でき、上記実施
例と同様の効果を奏する。Furthermore, although the above embodiment has been described only for recording information signals, it can of course be applied to magnetic recording and reproducing devices that record and reproduce information signals, and the same effects as in the above embodiments can be achieved.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明に係る磁気記録装置によれば、
磁気記録媒体の表裏の同一円周上で書込み電流の内外周
切替えができるので、内外周の書込み電流の設定が最適
化できる効果がある。As described above, according to the magnetic recording device according to the present invention,
Since the write current can be switched between the inner and outer circumferences on the same circumference on the front and back sides of the magnetic recording medium, it is possible to optimize the settings of the write currents on the inner and outer circumferences.

の構成図、第２図はこの発明の動作を示す信号波形図、
第３図はこの発明に使用しているヘッドの断面図、第４
図は従来の磁気記録装置の構成図、第５図は従来例の動
作を示す信号波形図である。FIG. 2 is a signal waveform diagram showing the operation of this invention.
Figure 3 is a sectional view of the head used in this invention;
This figure is a block diagram of a conventional magnetic recording device, and FIG. 5 is a signal waveform diagram showing the operation of the conventional example.

図において、１はサイド０側ヘツド、２はサイド１側ヘ
ツド、３はヘッド切替え回路、４は書込み回路、５はＴ
−ＦＦ、７は書込み電流源、８はトラックカウンタであ
る。In the figure, 1 is a head on side 0, 2 is a head on side 1, 3 is a head switching circuit, 4 is a write circuit, and 5 is a T.
-FF, 7 is a write current source, and 8 is a track counter.

Claims (1)

【特許請求の範囲】[Claims] （１）情報信号を磁気記録媒体に記録する磁気記録装置
において、 上記磁気記録媒体の両面に相互に数トラック分ずらして
配置されたヘッドに対して、磁気記録媒体の表裏で書込
み電流の内外周切替えを行なうトラックを異ならしめ、 磁気記録媒体の両面の同一円周上のトラックで書込み電
流の内外周切替えを行うようにしたことを特徴とする磁
気記録装置。(1) In a magnetic recording device that records information signals on a magnetic recording medium, a write current is applied to the inner and outer peripheries on the front and back sides of the magnetic recording medium with respect to heads that are arranged on both sides of the magnetic recording medium and are shifted by several tracks from each other. A magnetic recording device characterized in that the tracks to be switched are different, and the writing current is switched between the inner and outer circumferences on tracks on the same circumference on both sides of a magnetic recording medium.