JPS6163993A - Magnetic bubble memory detector - Google Patents

Magnetic bubble memory detector

Info

Publication number
JPS6163993A
JPS6163993A JP18467984A JP18467984A JPS6163993A JP S6163993 A JPS6163993 A JP S6163993A JP 18467984 A JP18467984 A JP 18467984A JP 18467984 A JP18467984 A JP 18467984A JP S6163993 A JPS6163993 A JP S6163993A
Authority
JP
Japan
Prior art keywords
detector
pattern
magnetic bubble
line
magnetic
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.)
Granted
Application number
JP18467984A
Other languages
Japanese (ja)
Other versions
JPH0646497B2 (en
Inventor
Mitsuru Sekino
充 関野
Minoru Hiroshima
実 広島
Shinzo Matsumoto
信三 松本
Nakahiko Yamaguchi
山口 中彦
Nobuyori Tsuzuki
都築 信頼
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP59184679A priority Critical patent/JPH0646497B2/en
Publication of JPS6163993A publication Critical patent/JPS6163993A/en
Publication of JPH0646497B2 publication Critical patent/JPH0646497B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To improve bubble transfer characteristics by using two types of cell patterns to constitute a magnifier. CONSTITUTION:Magnifiers 7, 4', 4' and 4 are formed with cell patterns 1c, 1b', 1b' and 1b where the pattern cycles are increased gradually up to the 4-fold length from the 2-fold length. These magnifiers are arrayed along the transfer direction P of magnetic bubbles an in a range up to a detector line 5. While magnifiers 3 and 7 consisting of cell patterns 1a and 1c where the pattern cycles are reduced down to the 2-fold length from the 4-fold length are provided along the direction P of the line 5. Bubbles are transferred satisfactorily up to the magnifier 4 consisting of a pattern 1b of a 4-fold length cycle lambdasb for suppression of nearby bubble noises set immediately before the line 5 via the magnifier 7 and then to the line 5. Then these bubbles are detected 5 and absorbed by the magnifier 3 consisting of the pattern 1a of a 4-fold length cycle lambdasa at the exit of the line 5. The absorbed bubbles are transferred in the direction P.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は磁気バブルメモリ検出器、特に検出器の一部を
構成する拡大器の磁気バブル転送特性を向上させた磁気
バブルメモリ検出器に関するもので ぜk 1 〔発明の背墳〕 磁気バブルメモリ素子の検出器は、軟磁性体金属パター
ンからなる拡大器と検出器ラインとから構成されており
、その多くは拡大器、検出器ラインとも同一プロセスで
形成される厚膜型の検出器が用いられている。この検出
器は磁気バブル情報を検知する部分であり、拡大器で数
百倍の長さのひも状に引き延ばされた磁気バブルが検出
器ライン下を通過するときの磁気抵抗変化を電気信号に
変換して磁気バブルの有無を判定する。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic bubble memory detector, and particularly to a magnetic bubble memory detector in which the magnetic bubble transfer characteristics of an expander forming a part of the detector are improved. Zek 1 [Background of the invention] The detector of a magnetic bubble memory element is composed of a magnifying device made of a soft magnetic metal pattern and a detector line, and in most cases, the magnifying device and the detector line are manufactured using the same process. A thick film type detector is used. This detector is the part that detects magnetic bubble information, and when the magnetic bubble is stretched into a string several hundred times the length using a magnifier and passes under the detector line, an electrical signal is generated that detects the change in magnetic resistance. to determine the presence or absence of magnetic bubbles.

過通、磁気バブルメモリ素子の大容量化にともない、デ
ータ読み出し速度の高速渡化が要求されている。この要
求に応えて、従来は回転磁界が2回転すると、1回読み
出す検出方式であったが、回転磁界の1回転で1回読み
出す方式(以下毎ビット読み出しと称する)が採用され
ている。そして、この毎ビット読み出しによると、同一
回転磁界周波数で2@のデータ読み出し速度が得られる
As the capacity of magnetic bubble memory devices increases, there is a demand for faster data read speeds. In response to this demand, the conventional detection method was to read out data once every two rotations of the rotating magnetic field, but a method of reading out once every rotation of the rotating magnetic field (hereinafter referred to as bit-by-bit reading) has been adopted. According to this bit-by-bit reading, a data read speed of 2@ can be obtained at the same rotating magnetic field frequency.

しかしながら、毎ビット読み出しの場合には、検出器ラ
インの直前または直後の拡大器に磁気バプルが必ず存在
するために検出器ラインはこの直前、直後の磁気バブル
の影8を受けて検出出力にノイズ(以下近接バブルノイ
ズと5称する)が発生することが知られている。そして
、この近接バブルノイズを抑制するためには検出器ライ
ンから磁気バブルを浩す方法が考えられ、したがって検
出器ラインの直前、直後の拡大器のセルパタ−ン周期を
長くしている。
However, in the case of bit-by-bit readout, since there is always a magnetic bubble in the magnifier immediately before or after the detector line, the detector line receives the shadow 8 of the magnetic bubble immediately before or after this, causing noise in the detection output. (hereinafter referred to as proximity bubble noise) is known to occur. In order to suppress this proximity bubble noise, a method has been considered to extend the magnetic bubbles from the detector line, and therefore the cell pattern period of the magnifiers immediately before and after the detector line is lengthened.

第1図(a) + (b+ 、 (C)は拡大器セルパ
ターン、同図(d)は転送路パターンの一例を示す拡大
平面図であり、同図(a) 、 (b)は前述し:欠毎
ビット読み出し用拡大器セルパターン、同図(c)は1
ビツトおき読み出し用拡大器セルパターンにそれぞれ用
いられている。同図において、前述した近接バブルノイ
ズを抑止するためには同図(a) 、 (b)に示す拡
大器セルパターンIa、1bの各周期λSa+λsbは
同図(d)に示す転送路パターン2の周期λの4倍長、
すなわち周期λSa+λ5b=4λで形成され、一方、
同図(c)に示す拡大器セルパターン1Cの周期λs0
は約2λ(λSC≧2λ)で形成されている。
1(a) + (b+), (C) is an enlarged plan view showing an example of an expander cell pattern, and FIG. 1(d) is an enlarged plan view showing an example of a transfer path pattern. : Expander cell pattern for reading every missing bit, the same figure (c) is 1
Each is used for an expander cell pattern for bit-by-bit readout. In the same figure, in order to suppress the aforementioned proximity bubble noise, each period λSa+λsb of the expander cell patterns Ia and 1b shown in FIGS. 4 times the period λ,
That is, it is formed with a period λSa + λ5b = 4λ, and on the other hand,
The period λs0 of the expander cell pattern 1C shown in FIG.
is formed by approximately 2λ (λSC≧2λ).

第2図および第3図は前述した毎ビット読み出しj目4
倍長周期の拡大器セルパターンを用いた磁気バブル検出
器の一例を示す要部拡大平面図である。これらの図にお
いて、3,4は第1図(a) 、 (b)に示す各拡大
器セルパターンIa 、1bからなる拡大器、5は検出
器ライン、6a、6b、6Cは毎ビット読み出しの場合
の連続バブルである。なお、Idは検出器ライン5に矢
印方向に流す8気バブル検出用電流、HBは紙面の裏か
ら表方向に加えられるバイアス磁界、HRはこの紙面に
反時計回り方向に加えられる回転磁界、Pは連続バブル
6a 、 6b、6eの転送方向である。
Figures 2 and 3 show the above-mentioned j-th bit readout.
FIG. 2 is an enlarged plan view of a main part of an example of a magnetic bubble detector using a double-period expander cell pattern. In these figures, 3 and 4 are enlargers each consisting of the enlarger cell patterns Ia and 1b shown in FIGS. It is a continuous bubble in case. In addition, Id is the current for detecting 8 bubbles flowing in the direction of the arrow in the detector line 5, HB is the bias magnetic field applied from the back of the paper to the front, HR is the rotating magnetic field applied counterclockwise to the paper, and P is the transfer direction of continuous bubbles 6a, 6b, and 6e.

しかしながら、このように構成される磁気バブル検出器
において、第2図に示す拡大器3は、第1図に示すよう
にセルパターン1aの幅taが太くかつパターン周期λ
Saが4倍長周期と長いことから、連続バブル$ a 
+ 5 b −+ 6 cのギヤツブG相互間の転送特
性は良好であるが、該パターン1aの中央部分での磁気
バブルの引き伸ばしおよびその転送特性が比較的悪いと
いう問題があった。一方、第3図に示す拡大器4はセル
パターン1bの曲率が大きく形成されているので、該パ
ターン1bの中央部分での磁気バブルの引き坤ばしおよ
びその転送特性は良好であるが、連続バブル6a、6b
、6CのギヤツブG相互間の転送特性が前述した第2図
の拡大器3に比べて劣るという問題があった。
However, in the magnetic bubble detector configured in this way, the expander 3 shown in FIG. 2 has a cell pattern 1a with a large width ta and a pattern period λ, as shown in FIG.
Since Sa has a long period of 4 times, continuous bubble $ a
Although the transfer characteristics between the gears G of + 5 b - + 6 c are good, there is a problem in that the magnetic bubbles are stretched in the central portion of the pattern 1a and the transfer characteristics thereof are relatively poor. On the other hand, in the expander 4 shown in FIG. 3, since the cell pattern 1b is formed with a large curvature, the magnetic bubbles in the central part of the pattern 1b have good stretching and transfer characteristics. bubbles 6a, 6b
, 6C has a problem in that the transfer characteristics between the gears G are inferior to those of the enlarger 3 shown in FIG. 2 described above.

このように転送特性の良好な毎ビット読み出し用の4倍
長周期拡大器を、単一セルパターンで構成することは、
それぞれのセルパターンで転送特性に’Jl 6’tが
あるので、極めて困・碓であるという欠点があった。
Configuring a quadruple length period expander for reading each bit with good transfer characteristics using a single cell pattern is as follows:
Since each cell pattern has a transfer characteristic of 'Jl 6't, it has the drawback of being extremely difficult and unreliable.

〔発明の目的〕[Purpose of the invention]

したがって本発明は前述した従来の欠点に鑑みてなされ
たものであり、その目的とするところは、磁気バブル転
送特性の良好な拡大器を0111えた磁気バブルメモリ
素子を提供することにある。
Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks, and an object thereof is to provide a magnetic bubble memory device having an enlarger with good magnetic bubble transfer characteristics.

〔発明の概要〕[Summary of the invention]

このような目的を達成するだめに本発明は、拡大器を少
なくとも2 、f、lrf 却のセルパターンを用いて
構成1.たものである。すなわち、検出器ラインの入口
までは磁気バブル転送特性の良好なパターンを用い、検
出ラインの出口にはギャップ相互間の転送特性の良好な
パターンを用いて磁気バブル検出器を構成したものであ
る。
To achieve this objective, the present invention provides an expander configured using at least 2, f, and lrf cell patterns. It is something that That is, a magnetic bubble detector is constructed by using a pattern with good magnetic bubble transfer characteristics up to the entrance of the detector line, and using a pattern with good transfer characteristics between gaps at the exit of the detection line.

〔発明の実施例〕[Embodiments of the invention]

次に図面を用いて本発明の実施例を詳細に説明する。 Next, embodiments of the present invention will be described in detail using the drawings.

第4図は本発明による磁気バブルメモリ検出器の一例を
示す要部平面図であり、前述の図と同記号は同一要素と
なるのでその説明は省略する。同図において、検出器ラ
イン5の直前、すなわち、磁気バブル転送方向Pに宿っ
て検出器ライン5に達するまでの間には、パターン周期
を2倍長から4倍長までパターン周期を徐々に拡大させ
た各セルパターンIc 、 1 b”、 1b’、 1
bからなる拡大器7゜4”、4’、4が配列されている
。この場合、拡大器4“。
FIG. 4 is a plan view of essential parts showing an example of a magnetic bubble memory detector according to the present invention, and since the same symbols as those in the previous figure represent the same elements, a description thereof will be omitted. In the figure, immediately before the detector line 5, that is, from staying in the magnetic bubble transfer direction P until reaching the detector line 5, the pattern period is gradually expanded from twice the length to four times the length. Each cell pattern Ic, 1 b'', 1b', 1
The enlargers 7° 4'', 4', 4 consisting of b are arranged. In this case, the enlarger 4''.

4 ’全構成する各セルパターン1b′、1b’ハ、パ
ターン中央部で磁気バブル転送特性の良好なセルパター
ン1bと同等の曲率を有しかつ周期のみを縮小し、て形
成されている。つ1り各拡大器714″+4’14はそ
のパターン周1111がr66気バブル転送方向Pに名
ってλsc<λsb″<λsb’<λSbの大きさの順
序でバター/周期を異ならせて配列されている。一方、
検出器ライン5の直後、すなわち、検出器ライン5の磁
気バブル転送方向Pに渚ってパターン周期4培長から2
倍長まで縮小させた各セルパターンIa、Icからなる
拡大器3,7が配設されている。
4' Each of the cell patterns 1b', 1b'c, which constitutes the entire cell pattern, has a curvature equivalent to that of the cell pattern 1b, which has good magnetic bubble transfer characteristics, in the central part of the pattern, and only the period thereof is reduced. Each expander 714''+4'14 has its pattern circumference 1111 arranged in the r66 bubble transfer direction P with different butter/periods in the order of size λsc<λsb''<λsb'<λSb. has been done. on the other hand,
Immediately after the detector line 5, that is, along the magnetic bubble transfer direction P of the detector line 5, the pattern period is 4 to 2.
Enlargers 3 and 7 each consisting of cell patterns Ia and Ic reduced to double length are provided.

このように構成された磁気バブル検出器において、検出
器ライン5以前の拡大器7に転送されてきた磁気バブル
は、転送特性の良好な2倍長周期λScのセルパターン
1Cからなる拡大器7で充分に引き伸ばされた後、検出
器ライン5の直前の近接バブルノイズ抑止用4焙長周期
λsbのセルパターン1bからなる拡大器4寸でIFi
次良好に転送され、さらに検出器ジイン5に転送される
と、検出器ライン5で磁気バブルが検出され、検出ライ
ン5の出口においては、4倍長周期λSaのセルパター
ン1aかもなる拡大器3に吸引されて矢印P方向に転送
される。すなわち、検出器ライン5の出口においては、
第5図で示すように検出器ライン5のシェブロンパター
ン間を接続する電流通路部5aの影響で磁気バブル反撥
磁界が弱まシ、転送・1¥性が最も低下する部分であり
、今後の磁気バブルメモリ素子の高密度化のために磁気
バブル径が微小化し、飽和磁化4πMsが大きくなるの
と逆比例してこの検出器ライン5の出口のギャップ転送
特性が著しく低下することが予想される。そこで、第4
図の一部を拡大した第6図に示すようにパターン幅ta
が太く、4倍長周期の拡大器セルパターン1aにより、
磁気バブルの吸引磁極が強化され、したがってギヤツブ
間転送が良好となる。
In the magnetic bubble detector configured in this way, the magnetic bubbles transferred to the expander 7 before the detector line 5 are transferred to the expander 7 consisting of the cell pattern 1C with double length period λSc and having good transfer characteristics. After being sufficiently stretched, IFi is installed with a 4-inch expander consisting of a cell pattern 1b with a 4-length expansion period λsb for suppressing adjacent bubble noise just before the detector line 5.
When the magnetic bubble is successfully transferred and further transferred to the detector line 5, the magnetic bubble is detected by the detector line 5, and at the exit of the detection line 5, the cell pattern 1a with the quadruple length period λSa is also formed by the expander 3. is attracted and transferred in the direction of arrow P. That is, at the exit of the detector line 5,
As shown in FIG. 5, the magnetic bubble repulsion field weakens due to the influence of the current passage section 5a connecting between the chevron patterns of the detector line 5, and this is the section where the transfer/returnability is the lowest. It is expected that the gap transfer characteristic at the exit of the detector line 5 will be significantly reduced in inverse proportion to the increase in the density of the bubble memory element as the magnetic bubble diameter becomes smaller and the saturation magnetization 4πMs becomes larger. Therefore, the fourth
As shown in FIG. 6, which is a partially enlarged view, the pattern width ta
Due to the expander cell pattern 1a, which is thick and has a quadruple long period,
The attractive magnetic pole of the magnetic bubble is strengthened, thus improving the gear-to-gear transfer.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、従来転送特性の悪
かった4倍長周期拡大器セルパターン間のギャップ転送
および検出器ライン出口のギャップ転送が良好となるの
で、磁気バブル転送特性が良好でかつ近接バブルノイズ
のない毎ビット読み出し用検出器が実現可能となるとい
う極めて優れた効果が得られる。
As explained above, according to the present invention, the gap transfer between the quadruple period expander cell patterns and the gap transfer at the exit of the detector line, which had conventionally had poor transfer characteristics, are improved, so the magnetic bubble transfer characteristics are improved. Moreover, an extremely excellent effect can be obtained in that a detector for reading every bit without adjacent bubble noise can be realized.

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

第1図ないし第3図はUt来の磁気バブル検出器の一例
を説明するだめの図、第4図は本発明による磁気バブル
検出器の一例を示す要部平面図、第5図、第6図は本発
明による磁気バブルメモリ検出器の動作を説明するだめ
の要部拡大平面図である。 1a、1b、1c・・・・拡大器セルパターン、2・・
・・転送路パターン、3,4・・・・拡大器、5・・・
・検出器ライン、6a+6b+6c・・・・磁気バブル
、7・・・・拡大器。 、−一 代理人 弁理士 高 僑 明 夫] 第1図 ((1)       (b) (C)       (d) 第2IA 第3図 第4図
1 to 3 are diagrams for explaining an example of a conventional magnetic bubble detector, FIG. 4 is a plan view of essential parts showing an example of a magnetic bubble detector according to the present invention, and FIGS. The figure is an enlarged plan view of the main part for explaining the operation of the magnetic bubble memory detector according to the present invention. 1a, 1b, 1c... Magnifier cell pattern, 2...
... Transfer path pattern, 3, 4... Enlarger, 5...
・Detector line, 6a+6b+6c...magnetic bubble, 7...magnifier. , - Patent Attorney Akio Ko] Figure 1 ((1) (b) (C) (d) Figure 2IA Figure 3 Figure 4

Claims (1)

【特許請求の範囲】 1、磁気バブルの有無を検出する検出器ラインの前後に
磁気バブル拡大器を有してなる磁気バブルメモリ検出器
において、前記拡大器を少なくとも2種類の異なるセル
パターンから構成したことを特徴とする磁気バブルメモ
リ検出器。 2、前記拡大器は4倍長周期の転送路とし、検出器ライ
ン直前のセルパターンはパターン相互間のギャップと同
等のパターン幅を有し、検出器ライン直後のセルパター
ンは該ギャップの2倍のパターン幅を有することを特徴
とした特許請求の範囲第1項記載の磁気バブルメモリ検
出器。
[Claims] 1. A magnetic bubble memory detector comprising a magnetic bubble expander before and after a detector line for detecting the presence or absence of a magnetic bubble, wherein the expander is composed of at least two different cell patterns. A magnetic bubble memory detector characterized by: 2. The expander has a transfer path with a cycle that is four times as long, and the cell pattern immediately before the detector line has a pattern width equivalent to the gap between the patterns, and the cell pattern immediately after the detector line has a width twice that of the gap. 2. The magnetic bubble memory detector according to claim 1, wherein the magnetic bubble memory detector has a pattern width of .
JP59184679A 1984-09-05 1984-09-05 Magnetic bubble memory detector Expired - Lifetime JPH0646497B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59184679A JPH0646497B2 (en) 1984-09-05 1984-09-05 Magnetic bubble memory detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59184679A JPH0646497B2 (en) 1984-09-05 1984-09-05 Magnetic bubble memory detector

Publications (2)

Publication Number Publication Date
JPS6163993A true JPS6163993A (en) 1986-04-02
JPH0646497B2 JPH0646497B2 (en) 1994-06-15

Family

ID=16157465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59184679A Expired - Lifetime JPH0646497B2 (en) 1984-09-05 1984-09-05 Magnetic bubble memory detector

Country Status (1)

Country Link
JP (1) JPH0646497B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952490A (en) * 1982-09-20 1984-03-27 Fujitsu Ltd Magnetic bubble memory element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5952490A (en) * 1982-09-20 1984-03-27 Fujitsu Ltd Magnetic bubble memory element

Also Published As

Publication number Publication date
JPH0646497B2 (en) 1994-06-15

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