JPS5821357B2 - Souhou Koseijiki Domain Tensou Cairo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION SUMMARY OF THE DISCLOSURE The present invention provides a single wall (sin wall) between two independent circuits identified as a larger loop and a smaller loop.
gle-wall) relating to the transfer of magnetic domains.

The present invention discloses the use of two separate magnetic elements in the coupling part of a transfer circuit with common current conductors.

BACKGROUND OF THE INVENTION U.S. Pat. No. 3,714,639 and all patents cited therein are of record in this patent application.

The transfer arrangement disclosed in U.S. Pat. Magnetic soft dollar sign (d
It is necessary to provide an insulator in the transfer circuit between the polar sign)'' type element.

The need for this insulator is required because if there were no insulator between them, the "dollar sign" shaped guide elements would form a metal loop and short the circuit.

Obviously, a system without insulation would be ineffective.

The insulators required by the prior art include additional construction steps.

And as can be easily evaluated, this additional step
It is time-consuming, expensive, and hinders the achievement of growth in creating so-called "bubble memories."

The bidirectional domain transfer circuit of the present invention was discovered because
This is due to the drawbacks mentioned above.

Accordingly, it is desirable to provide a new and improved bidirectional transfer gate between larger and smaller loops in a data processing system that is easier and more economical to create. , which is the object of the present invention.

SUMMARY OF THE INVENTION The present invention provides an easy array by which data in a data processing array is easily transferred from its larger loops to its smaller loops.

The invention is based on the use of a metal conductor overlay directly over two separate and distinct magnetic elements in a magnetic domain transfer circuit.

This direct contact arrangement is made possible by the fact that the metal conductor overlay contacts each magnetic element at only one location.

Therefore, there is no possibility of electrical short-circuiting of the conductors by means of the current-transfer magnetic circuit.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, the general arrangement of a mass memory arrangement 10 in which the present invention is utilized is shown.

Mass memory 10 in the preferred embodiment is formed on a thin single crystal orthoferrite or garnet wafer or deposited film.

When the membrane is constructed, it is deposited so that the "easy" axis is perpendicular to the surface of the sea urchin.

The sea urchin is then subjected to an external magnetic bias field H8 perpendicular to its surface.

The bias magnetic field acts to stabilize the closed domain wall within the film as columnar domains within the closed domain wall.

The absence or presence of a domain represents a binary "0" or "1" for the purpose of processing data.

Generally, mass memory arrangement 10 incorporates a larger binary information loop 12 in which data circulates around the loop in a continuous manner.

In other words, the loop represents an endless track or shift register through which binary data circulates.

Data enters the larger loop 12 at the DATA IN or generator location and circulates within the endless shift register.

The larger loop has a sensor station 1 for reading information from the larger loop, if needed.
It has 6.

For purposes of explanation, assume that the larger loop 12 indicates the presence of binary data 11011 at a certain location and time.

The "1" data is illustrated in FIG. 1 by the domain existing in the larger loop 12, beside the smaller loops A, B, D and E.

The 60'' data is indicated by the absence of the smaller loop C on the opposite side of the domain.

Transferring words or bytes between the larger loop 12 to facilitate data accumulation in the smaller loop and data operations in the larger loop is performed within the large memory configuration 10. is required in

The data may represent fixed data, such as the sine of an angle or the operation of a program mink subroutine to be temporarily stored within a smaller loop.

Therefore, from the larger loop 12 to the smaller loop A
,B,C! , D and E, and vice versa, the present invention is particularly useful where it encircles parts of both the larger and smaller loops. Directed to the area enclosed by the dashed line, and the following discussion will generally be limited to this area.

Therefore, for simplicity, the magnetic domain in the larger loop 12 for the smaller loop D (i.e., binary t+
1 ii) will only be discussed.

Transfer of the remaining information should be understood and will be transferred in a similar manner.

Referring now to FIG. 2 and the operation and structure of the bidirectional magnetic domain transfer circuit.

The figure shows a larger loop 12 consisting of a plurality of soft magnetic tees A, 0 and F and soft magnetic bars B and G.
Shows a partial layout.

The smaller loop D consists of magnetic elements I, J and H.

Soft magnetic wye elements E and D provide the coupling element between the larger loop 12 and the smaller loop D.

The T, Y and bar shapes in the large and small loops are constructed by providing a thin film permalloy overlay on the Urchin-10.

Metal conductor overlay β is in-plane (1n-
plane) magnetic field, placed on a permalloy mold to provide a magnetic field gradient that along with HRl allows movement of domains from larger to smaller loops.

The current carrying conductor, β, is a metal conductor, such as gold, electrodeposited on the wafer and mold of the permalloy overlay.

Particular care should be taken in the arrangement of the conductors β with respect to the Permalloy type that it does not contact other Permalloy elements in more than one location.

The significance of this is that no short circuit current is generated across the metal conductor β by means of the permalloy type where the current transfer element is.

The significance of this fact is that in the gold conductor configuration it can be placed directly onto the overlay mold without an insulating separator.

Assume that the magnetic domain or binary t+ 111 is transferred from the larger loop 12 to the smaller loop D.

Generally, the magnetic field accesses domain propagation using a counterclockwise rotating magnetic field H8 provided in the plane of the sea urchin.

The action of the magnetic fields associated with the soft magnetic tee and vertical bar shapes results in propagation of the magnetic domains from right to left as shown.

The propagation of the magnetic domain occurs in elements A, B, C, D, E, F when the transferred information is present only in the larger loop.
and arises from G.

It will be appreciated that the elements for G are only part of the larger loop.

Transfer is generally accomplished in the following manner.

The in-plane rotating H field is provided by two orthogonal coils (not shown) driven by equal magnitude sinusoidal (s 1nuso ida I) currents 90 degrees apart in phase.

This rotates the in-plane H field 360 degrees, operating counterclockwise in the embodiment under discussion.

Magnetic domain is larger loop 12 at position 4 of T-A
Assume that it is located within.

The numbers on the overlay indicate where the positive pole will occur when the rotation vector reaches the compass station shown on the upper left hand side of Figure 2.

When the H magnetic field rotates counterclockwise and reaches vector position 1 on the compass, the magnetic pole becomes + at position 1 of T-A.

In other words, the H magnetic field causes free poles to be formed at the T-shaped junctions such that position 1 is ten.

Assuming that the domain has a negative magnetic charge, it is easy to see that the domain moves from position 4 to position 1.

When the H magnetic field vector reaches position 2 on the compass,
Position 2 of T-element B is charged to 10 and the domain transfers thereto.

When a rotating magnetic field occurs between 2 and 3 on the compass, the domain moves from position 2 to position 3 on bar B.

When the rotating magnetic field reaches vector positions 4, 1 and 2 sequentially, positions 4, 1 and 2 of T-0 are charged to 10, and the magnetic domain continues to move to the left ending at position 2.

As the in-plane H field continues its counterclockwise rotation, position 3 on the Y element becomes ten between compass positions 2 and 3.

This may be understood by normalizing the lower portion of the Y element to bring the rectangular portions closer together.

Therefore, the − charged domain moves from position 2 on the T element 1 to position 3 on the Y element.

In a similar manner, position 3+ on \parE becomes positive when the vector field moves between 3 and 4, hence the domain moves from 3- to 3+.

The domain is located at position 3 since position 3+ is stronger than position 3-.
Move from - to 3+.

The domain therefore continues to move from right to left from positions 4, 1 and 2 of the T-element F to position 3 of the vertical bar 3.

It should be readily understood from the above discussion how the magnetic domains migrate along the larger loop using a soft magnetic overlay pattern in conjunction with a rotating in-plane H magnetic field.

Now, data such as 11011 shown in FIG. 1, which is expressed by whether or not a magnetic domain exists, is
Let us assume a situation where the data is transferred to the smaller loops A to E.

The following explanation will demonstrate how a single binary 1 bit located in the larger loop 12 is transferred to the smaller loop D.

It will be appreciated that this binary transfer is exemplary and applies equally to the remaining data transfers.

The transfer from the larger loop 12 to the smaller loop D takes place via a Y-element coupling element associated with the rotating in-plane H magnetic field and the current Is in the conductor β.

A current s is applied to the conductor β and the process occurs when the in-plane H magnetic field vector is positioned between positions 3 and 4 on the Y element.

The movement is performed in the following manner. It will be recalled that when the H magnetic field vector reaches a direction that coincides with the foot of the Y element relative to position 3-, the domain has moved from position 2 on the T element C to position 3- on the Y element. Probably.

At this time, the 1-bit domain is still circulating within the larger loop.

When it is decided to move the bit from the larger loop to the smaller loop, a current pulse Is creating a magnetic field Hs is supplied during the period when the vector is between positions 3- and 4.

In the discussion of domain forwarding in the larger loop only,
It will be recalled that the transfer took place within the same time frame.The vertical component of the magnetic field Hs (see Fig. 3a) resulting from the current Is in the conductor β is proportional to the movement of the domain across the width of the conductor. induces an opposite magnetic field gradient.

It is well known that closed wall domains move in a magnetic field gradient from regions of high bias field to regions of low bias field.

Due to the current, Is, the magnetic field gradient so produced (Fig. 3b) is the magnetic field gradient of the Y element E caused by the stray magnetic field from the ten magnetic poles in position, when the element E is magnetized by the rotating magnetic field H□. The upper position 3+ (see Figure 2) serves to cancel the magnetic field gradient.

The resulting magnetic field gradient at position 3+ on Y element E is substantially zero or negative.

This gradient is the sum of the magnetic field force HB, which exists downward, and H8, which exists upward on the right side of conductor β and downward on the left side, as understood by application of Ampere's law. (Fig. 3b).

However, in order for a domain to move, it must experience a portion of positive magnetic field gradient.

The magnetic field experienced by the domain does not move from position 3- to 3+ since it is actually zero.

In other words, the movement in the larger loop is terminated as a result of the application of the current ■s.

When the in-plane H magnetic field rotates, it reaches compass position 4 and therefore a ten pole is formed at the position which can be understood by the normalization of this rectangular section.

At the same time, position 3- becomes less positively charged, so that the negatively charged domain is influenced to move to position 4 of the Y-type element.

The current pulse Is is terminated just before the rotating magnetic field vector reaches position 4 on the Y-element.

Continued rotation of the vector magnetic field moves the domain to position 1+
Continuously move to

With respect to further rotation of the H magnetic field (C), position 2 on bar "J 11 has a ten pole formed there, and domain 4 moves from position 1+ to 2.

Eventually, at this position, the domain is transferred to the smaller loop D by using the Y coupling element.

The domain then cycles in the smaller loop by moving from J-bar position 2 to H-bar position 3- as the rotation vector progresses between compass positions 2 and 3.

This domain movement occurs due to the formation of a positive electrode at position 3-.

This can also be easily understood by normalizing this lower position of the H-bar.

The domain moves from position 3- to 4 as it rotates to compass position 4, whereby the rotation vector contains the pole.

Since position 4 is more positive than position 3-, there is a movement of the domain from position 3- to 4.

Further rotation of the H-field induces the positive pole to position 1 and the negative pole to position 4 resulting in a movement from 4 to 1.
is induced in the vicinity of .

The movement of this domain within the smaller loop is similar to H
Continue in an upward direction (not shown) by placing the elements and bar elements in close proximity to each other.

Eventually, the domain returns to mark the H element shown, and the domain returns to position 1, 2 and 3+ of the H bar, and position 4 of the ■ bar.
, and will be temporarily positioned at position 1- in Y-bar E.

Assume that the data processing system requires that information be passed from a smaller loop back to a larger loop.

This transfer takes place via the coupling means E in the following manner.

After the domain is located at position 1- of the Y element E, a current Is is supplied to the conductor β.

Therefore, the magnetic field gradient generated at position 1+ is essentially zero.

As mentioned above, this magnetic field gradient prevents movement from position 1- to position 1+.

The current pulse 8 is terminated just before the rotating magnetic field vector reaches position 2 of the \bar E.

Therefore, the conductor current Is prevents the movement of further domains within the smaller loop.

As a result, domains are transferred along coupling element E from positions 1-22 and 3+ by in-plane magnetic field rotation, and then domains are transferred along coupling element E from positions 1-22 and 3+ of T-element F through typical magnetic field access propagation. 2, and proceed along bar G position 3 to the larger loop.

A preferred embodiment of the invention includes at least two Y-type coupling elements.
Although the two legs have been described as having the same length,
It should be understood that modifications to this arrangement may be made by those skilled in the art without departing from the spirit of the invention.

Therefore, in some cases, a Y-type coupling element whose three legs are all different lengths may be beneficial.

The present invention is carried out as follows.

(1) within a layer of magnetic material, transposing a single wall domain from a first closed loop to a second closed loop, both defined by magnetically soft elements, and utilizing an in-plane rotating magnetic field; An improvement to the magnetic arrangement of the magnetic field, consisting of the following:

a) sweat 1 and second identical kisa means arranged between a first and a second closed loop; b) above said coupling means and along said coupling means for forming a magnetic gradient; , directly disposed conductor means, and by rotating said in-plane magnetic field in conjunction with a timed current signal provided to said conductor, said domain is moved from said first closed loop to said first closed loop. 2 closed loop and vice versa.

(2) wherein each of said first and second coupling means has two legs longer than a third leg and is substantially Y-shaped;
1) Magnetic arrangement as described.

(3) Said Y-shaped coupling means are arranged such that the obtuse angles provided by the two longer legs are opposite each other with a slight offset. ).

(4) said (2) where said conductor means is provided on one of said longer legs of said first Y-shaped coupling means, as well as the longer legs of said second Y-shaped coupling means; ) described magnetic array.

(5) A method of transferring a single wall domain from a first closed loop to a second closed loop, both defined by magnetically soft elements, in a layer of magnetic material, the method comprising: means are included between the first and second loops, and utilize an in-plane magnetic field, and include the steps of:

a) providing said transfer conductor directly on said respective coupling means such that the transfer conductor contacts each coupling means in only one position; b) connecting said domain from said first closed loop to said second closed loop; Supplying current to the transfer conductor in combination with the in-plane magnetic field to move into a closed loop and vice versa.

(6) each said coupling means is Y-shaped with two legs longer than the third leg, such that the obtuse angles formed by the two longer legs of the Y-shaped means are substantially opposite to each other; The method according to (5) above, which includes the following steps.

a) Providing said transfer conductor on one long foot of said first Y-shaped means as well as on one long foot of said second Y-shaped means;

(7) The method described in (6) above, which includes the following steps.

a') when a domain is being transferred from said first closed loop to said second closed loop, a rotating magnetic field vector exists between the obtuse angle formed between one said longer leg and the shorter leg; b) timing the generation of a current signal in said transfer conductor during a period of time when a rotating magnetic field vector is 1 when domains are being transferred from said second closed loop to said first closed loop;
timing the generation of a current signal in said transfer conductor during the period existing between the obtuse angle formed between said longer leg of one and said shorter leg of a second Y-shaped means;

(8) having a single large loop and a plurality of small loops configured by a plurality of magnetically soft elements, in which domains are transferred by an in-plane rotating magnetic field when activated;
A magnetic bubble memory having a plurality of magnetically soft coupling elements and a bent transfer conductor by which a domain can be transferred from a small loop to a large loop or vice versa, the magnetic bubble memory having A pair of coupling elements are provided separately between the large loop, and the transfer conductor is provided on the soft magnetic elements so as to contact only a single region of the elements. A bidirectional magnetic domain transfer circuit.

(9) Each of the coupling elements of each pair has two legs longer than the third leg, and the obtuse angle formed between the two long legs is Y-shaped. The bidirectional magnetic domain transfer circuit according to (8) above, which is made of a soft magnetic material.

]10) The bidirectional magnetic domain transfer circuit according to (9) above, wherein the two long legs of each Y-shaped element have equal lengths.

(11) The bidirectional magnetic domain transfer circuit according to the above (9) or (10), wherein the two coupling elements forming each pair are arranged to be slightly different from each other.

[Brief explanation of the drawing]

FIG. 1 shows the overall data processing arrangement in which the present invention is implemented. FIG. 2 is a circuit arrangement used for bidirectional transfer of information between large and small loops of a data processing system. FIG. 3 is a cross-sectional view illustrating the operation of the magnetic field gradient. 10... Large capacity memory, 12... Larger loop, 14... Generator, 16...
...Sensor station.

Claims (1)

[Claims] 1. It has a single large loop and a plurality of small loops composed of a plurality of magnetically soft elements, and when activated, domains are transferred by an in-plane rotating magnetic field and magnetically A magnetic bubble memory having a plurality of soft coupling elements and a bent transfer conductor by which a domain can be transferred from a small loop to a large loop or vice versa, wherein each small loop and a large loop a pair of coupling elements are provided separately between the two, and the transfer conductor is provided on the soft magnetic elements so as to contact only a single region of the elements. tropic magnetic domain transfer circuit, 1