JPS5965990A - Magnetic bubble transfer gate - Google Patents

Abstract

PURPOSE:To realize the transfer of a bubble between loop-like transfer lines by power consumption being as minute as possible in a transfer gate which is capable of executing optionally the transfer of a bubble by providing a band- like conductor pattern which is formed so that a part of the transfer line s overlapped. CONSTITUTION:A bubble is transferred to a position of 36 through positions of 34 and 35 on the second transfer line 22 by a counterclockwise in-face rotating magnetic field. When the bubble comes to the position of 36, the rotating magnetic field is directed to the direction as indicated with an arrow 27. When a current pulse is impressed from this phase to a conductor pattern 24 in the direction as indicated with an arrow 25, a bias magnetic field distribution is induced in a gap part between the second transfer line and the third transfer line due to disorder of a current distribution caused by the first notch and the second notch provided on the conductor pattern 24. The bubble of the position of 36 receives driving force for going toward a position of 37 by this bias magnetic field distribution and is transferred to the position of 37. During this time, the bubble is held in the position 37 by a cavity of the bias magnetic field distribution, which is generated in the position of 37.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer gate in a magnetic puzzle element. More specifically, the present invention relates to a transfer gate that can arbitrarily transfer bubbles between two loop-shaped transfer paths.

Since magnetic bubble elements are essentially serial access memory devices, they have the disadvantage that access to information becomes slow when attempting to increase memory capacity by improving storage density.

In order to overcome the drawbacks of such magnetic bubble elements, in November 1981, I.E.
Transaction on magnetism7. (IE
EE Transaction on Magneti
In a paper published in the magazine MAG-17, No. 3, @ pages 3038-3040, a magnetic bubble element with a new element configuration called the on-chip cache method was proposed, and it was found to be extremely effective in shortening access time. has been shown to be effective. Figure 1 schematically shows the element configuration of the on-chip cache method described in the above paper. In Figure 1, 1 is a bubble generator, 2
is a bubble detector. 4V! Frequently accessed information (bubble string) is stored in the cache minor loop. 5 is a storage minor loop in which information that is accessed infrequently is stored. Transfer of bubbles between the major transfer path 3 and the cache minor loop 4 is performed by a first transfer gate 6. Minor loop 4 for cache and minor loop 5 for storage. ! :
The transfer of bubbles between is performed by 7 second transfer gates. FIG. 2 shows the specific shape of the conductor button used in the second transfer gate shown in the above paper. As can be understood from Figure 2, the conventional conductor batten has a narrow meandering section, which has a high electrical resistance, resulting in a major drawback in that the power consumption required to stably transfer the bubble increases. have].

An object of the present invention is to provide a magnetic bubble transfer gate that can realize bubble transfer between loop-shaped transfer paths necessary for an on-chip cache method with as little power consumption as possible.

That is, the present invention has the following advantages: 2) a first transfer path formed on a magnetic thin film; and a loop-shaped second transfer path formed at a constant distance from the first transfer path; and a transfer gate formed in a magnetic bubble element having a loop-shaped third transfer path formed at a constant interval from the second transfer path, the second transfer path and the third transfer path and a band-shaped conductor batten formed so that a part thereof overlaps with a part of the second and third transfer paths, respectively, and near the intersection of the conductor batten and the second transfer path. The magnetic bubble transfer gate is characterized in that a first notch is formed in the conductor button and a second notch is formed near the intersection of the conductor button and the third transfer path.

Next, the present invention will be explained in detail based on an example of implementation of the present invention shown in FIG. In FIG. 3, 21 is a first transfer path, 22 is a loop-shaped second transfer path, 23 is a knob-shaped third transfer path, an arrow 33 shown by a broken line is the transfer direction of the burzle, and 44 is a loop-shaped second transfer path. The direction of the bias magnetic field, 2.1 is the conductor baton, 45.46 is the first
And also the second incision gin. The second example shown in this example and the scales
In the third embodiment, the first transfer path 21, the second transfer path 22, and the transfer path @3 are formed by selectively implanting ions into the IIA thin film. First transfer path 21
Since the bubble transfer means between the transfer path 22 and the second transfer path 22 is already known, the explanation thereof will be omitted here. Transfer of bubbles from the 20th transfer path 22 to the third transfer path 23 is performed as follows. It is transferred to the position 36 via the positions 34 and 35 on the second transfer path 22 by a counterclockwise in-plane rotating magnetic field (hereinafter simply referred to as a rotating magnetic field).

When the bubble reaches position 36, the rotating magnetic field is directed in the direction of arrow 27. When a current pulse is applied to the conductor button 24 in the direction of the arrow 25 from this phase, the disturbance in the current distribution caused by the first and second notches provided in the conductor button 24 causes the second transfer path to change. A bias magnetic field distribution is induced in the gap between the transfer path and the third transfer path.

The bubble at position 36 becomes 37 due to this bias magnetic field distribution.
The driving force directed toward position 37 is received and transferred to position 37.

If the current pulse is continued to be applied over the phase range shown by the arrow 31, the bubble will be held at the position 37 due to the bias magnetic field distribution generated at the position 37. In this case, the rotating magnetic field is directed in the direction of arrow 28, and at this time, a charged wall that pulls the puzzle is formed at position 37.Then, the bubble is transferred to the third direction as the charged wall is moved by the rotating magnetic field. 38 locations along the route.

Transfer of bubbles from the third transfer path to the second transfer path is performed as follows. On the third transfer path 23, the bubble is transferred from the position 39.40 to the position 4I. When the bubble reaches fILIN 41, the rotating magnetic field is directed in the direction of arrow 29.

From this phase, if a current pulse in the direction of arrow 26 is applied to the conductor pattern 24 in the phase range shown by arrow 29, bubbles are generated in the same manner as in the case of transferring bubbles from the second transfer path to the third transfer path. It is possible to transfer from the third transfer path to the second transfer path.

Arrow 30 is the direction of the rotating magnetic field when the lightning or current pulse breaks. Transfer the puzzle from the third transfer path to the second transfer path ti39.40.41.42.43 position III
This will be done in the following steps. In the above bubble transfer, if no current pulse is applied to the conductor pattern, the bubble will be transferred to the second
The transfer route continues to be transferred using the third transfer route.

The conductor pattern 24 shown in the above embodiment is
Compared to the conventional conductor pattern shown in the figure, the conductor width is wider, so the electrical resistance is lower. Therefore, by implementing the present invention, a nonmagnetic puzzle transfer gate that stably transfers puzzles between loop-shaped transfer paths with a small amount of power dissipation can be realized.

FIG. 4 shows the central axis of the second transfer path 22 and the third transfer path 2.
This is a second embodiment of the present invention in which the center axis of 3 is slightly shifted and the position of the cut in the conductor pattern is changed. 45
．． 46 is the stripe 1 of the conductor pattern 24 and the cut of 81 yen 2. When the no-pull being transferred through the second transfer path 22 reaches position 36, the arrow 2 appears on the conductor pattern 24.
If a lightning or flow pulse with a phase range shown by an arrow 31 is applied in the direction of 5, the bubble will be transferred to the third transfer path 23 via the position 37 based on the principle explained using FIG. . Arrow 27 is the direction of the rotating magnetic field when the current pulse mark 7o is applied, and arrow 28t is the direction of the rotating magnetic field when the current pulse is stopped. Similarly, when the bubble being transferred through the third transfer path 23 reaches position 41, if a current pulse in the phase range indicated by arrow 32 is applied to the conductor pattern 24 in the direction of arrow 26, the bubble will move to position 420. through the second transfer path 2
Transferred to 2. The arrow 29i indicates the direction of the rotating magnetic field when the '11i flow pulse is applied, and the loss t·υ30 indicates the direction of the rotating magnetic field when the same current pulse is stopped.

FIG. 5 shows a third embodiment of the present invention in which the positions of the notches 45 and 46 in the conductor pattern are changed. When the bubble being transferred through the 4y2 transfer path 22 reaches the position 36, if a current pulse in the phase range shown by the arrow 31 is applied to the conductor pattern 24 in the direction of the arrow 25, as explained using FIG. Based on the principle, the signal is transferred to the third transfer path 23 via the position of the bubble Fi 37. Arrow 27 indicates the direction of the rotating magnetic field when the above-mentioned '#i current pulse is applied, and arrow 28 indicates the direction of the rotating magnetic field when the same current pulse is stopped. Similarly, when the bubble being transferred through the third transfer path reaches position 37, if a lightning or current pulse with a phase range shown by arrow 32 is applied to the conductor pattern 24 in the direction of arrow 26, the bubble will move to position 36. The data is transferred to the second transfer path 22 via the position .

The shapes of the first transfer path, second transfer path, third transfer path, and conductor pattern are as shown in Figures 3, 4, and 5. However, it goes without saying that any shape that can transfer bubbles according to the principle explained using FIG. 2 is included in the present invention. In addition, in the embodiment of the present invention, the first transfer path, ff (second transfer path, and third transfer path) were formed by selectively implanting ions into the magnetic thin film, and exhibited a magnetic bubble cord. However, it is clear that similar effects can be obtained by implementing the present invention in magnetic bubble cords in which the first, second, and third transfer paths are formed of soft magnetic batons such as permalloy. It is.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of an on-chip cache type magnetic bubble element, Figure 2 is a diagram showing a conventional conductor pattern, and Figures 3, 4, and 5 are examples of a transfer gate according to the present invention. FIG. 4 is a diagram showing the operation of a magnetic bubble element using the transfer gate. 1 is a bubble generator, 2 is a bubble detector, 3 is a major transfer path, 4 is a minor loop for cache, 5 is a minor loop for storage, 6 is a first transfer gate, 7 is a second transfer gate, 21 is the first transfer path, 22-digit loop-shaped second transfer path, 23 is the loop-shaped third transfer path, 24 is the conductor, 25.26
is the direction of the current pulse, 27, 28, 29t30 is the direction of the rotating magnetic field, 31.32 is the applied phase range of the city 1 style pulse,
33 is the bubble transfer direction, 34935, 36, 37.3
B, 39°4()+4]t42+43 is the position of the bubble during transfer, 44 is the direction of the bias magnetic field, and 45.46 are the first and second incisions of the fundactor back, respectively. Figure 1 Figure 2 Figure 3 and Figure 4

Claims (1)

[Claims] 1. A first transfer path formed on a magnetic thin film capable of holding a magnetic puzzle, and a loop-shaped second transfer path formed at a constant distance from the first transfer path. , and a transfer gate formed in a magnetic puzzle element having a loop-shaped third transfer path formed at a constant interval from the second transfer path, wherein the second transfer path and the third transfer path are connected to each other. A band-shaped conductor baton is formed between the transfer path and the transfer path so that a portion thereof overlaps with a portion of the second and third transfer paths, respectively,
A first cut is formed near the intersection of the conductor button and the second transfer path, and a second cut is formed near the intersection of the conductor button and the third transfer path. Magnetic bubble transfer gate. 2. The magnetic bubble transfer according to claim 1, wherein the second transfer path and the third transfer path are formed so that their longitudinal directions are parallel to each other. Gate. 3. The magnetic bubble transfer gate according to claim 1, wherein the magnetic bubble transfer path is constituted by a row of battens selectively implanted with ions on a magnetic thin film.