JPS583313B2 - Jiki Bubble Souch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a magnetic bubble device.

Typically, a magnetic bubble device consists of a circuit that controls the generation and erasure of bubble domains, a circuit that stores the bubble domains, a logic operation circuit that utilizes the repulsion between bubble domains, and finally a circuit that detects the existence of bubble domains. The present invention particularly relates to this detector.

As shown in FIG. 1, magnetic bubble detectors that utilize the magnetoresistive effect of soft ferromagnetic materials such as permalloy have recently been used.

In the figure, 1 is a chevron-shaped transfer element made of permalloy or the like, 2 is a magnetic bubble sensor made of permalloy or the like, and 3 is a magnetic bubble sensor made of permalloy or the like.
is the magnetic bubble injection part.

Figures 2a and 2b are principle diagrams showing the mechanism for transferring bubble domains. In Figure 2a, 1 is the above-mentioned chevron transfer element, and the bubble domain is routed from A→B→C→D→E. It will be transferred via

Note that this bubble domain is transferred as the in-plane rotating magnetic field rotates in the clockwise direction of A→B→C→D→E shown in FIG.

In this case, A-E in Figure 2a and A-E in Figure 2b are synchronized, and as a result, the bubble domain follows the rotation of the in-plane rotating magnetic field and is transferred bit by bit. Become.

Bubble domains transferred based on this principle are injected from the magnetic bubble injector 3 shown in FIG. It will be sensed.

On the other hand, the bubble domain injected into the magnetic bubble detector is obtained by dividing the bubble domain transferred within the storage loop into two, the details of which are shown in FIG.

In the figure, reference numeral 6 denotes a storage loop composed of a group of chevron-shaped transfer elements, and this storage loop 6 is coupled to the bubble injection section 5 of the magnetic bubble detector 4 by a replicator 7.

The replicator 7 is usually formed of a conductor such as aluminum, and by passing a pulse current through it, the bubble domain transferred in the memory loop 6 is shredded.
The other divided bubble domains are sensed by the sensing line through the bubble injection part 5,
The original bubble domain is transferred as is in the storage loop 6.

In other words, unbroken memories continue.

However, according to the conventional magnetic bubble device having such a configuration, when bubble domains are present in all transfer paths of the storage loop, that is, when bubble domains are present in all pits, the bubble domain dividing operation by the replicator 7 is generally performed in one bit. It can only be done every other bit, not every other bit.

Therefore, as a first method, in order to check all the pits in the memory loop 6, the bubble domains are made to pass through the memory loop 6 twice, and the bubble domains at even addresses are replicated in the first pass, and the bubble domains at even addresses are replicated in the second pass. Measures are taken to replicate bubble domains located at odd-numbered addresses.

As a second method, bubble domains are stored every other bit in the storage loop 6, and the bubble domains every other bit are replicated.

However, the first method increases the read time.

In other words, for example, the read time of a 16K bit capacity device with an IOOKHZ in-plane rotating magnetic field is 10 μsec.
cX16KX2=0.32 sec, which is extremely long.

Furthermore, the second method has the disadvantage that the storage capacity of the storage loop 6 is halved.

Therefore, recently, in order to eliminate the above drawbacks, a fourth
As shown in the figure, two magnetic bubble detectors 4, 4a are installed, and bubble domains are injected into the magnetic bubble injection parts io, i1 of the respective magnetic bubble detectors 4, 4a via the respective replicators 8, 9. For example, the magnetic bubble detector 4 detects bubble domains at even addresses, and the magnetic bubble detector 4a detects bubble domains at odd addresses.

However, with such a configuration, the dimensions of the magnetic bubble detector itself are large, about 2 mm x 600 μm, and having two of them means that the proportion of the chip area will exceed 30%, making it difficult to miniaturize and reduce the size of the chip. It has the disadvantage of not being able to achieve price reduction.

Therefore, an object of the present invention is to shorten the read time and improve the storage capacity while maintaining the miniaturization and low cost of the chip.

In order to achieve such an object, the present invention uses one magnetic bubble detector, and this detector is provided with two replicators and two magnetic bubble injectors separated by a specific bit interval. This will be explained in detail below using examples.

FIG. 5 is a simplified configuration diagram showing an embodiment of the magnetic bubble device according to the present invention, and the same parts as in FIG. 4 are designated by the same reference numerals.

As is clear from the figure, the magnetic bubble device according to the present invention includes one magnetic bubble detector 4, two magnetic bubble injection parts 10.11 provided in this magnetic bubble detector 4,
The magnetic bubble injection portions 10 and 11 are provided in the magnetic bubble transfer device 6 formed by the chevron transfer element 1 and respectively
It consists of two replicators connected to the

Here, if the number of bits from the replicator 9 to the injection section 11 is nl, the number of bits from the replicator 8 is n2, and the number of bits from the replicator 8 to the injection section 10 is n, then the following relationship is satisfied. Bit alignment shall be performed.

nl=(n2+n3) Moreover, n2 is an odd number.

Next, in order to facilitate understanding of the operation of the magnetic bubble device according to the present invention, let us assume that the number of bits of the memory loop 6 is K bits, and that the bubble domain in the hairpin loop of the replicator 9 is Number them consecutively so that they become 1.

The timing of the replicator 9 is set to replicate odd-numbered bubble domains, and the replicator 8 is set to replicate even-numbered bubble domains, and the pulse current is caused to flow.

In this case, the bubble domains entering the magnetic bubble detector 4 are as shown in the following table.

In the above table, the numbers marked with "○" indicate the bubble domains replicated by the replicator 9,
The numbers marked with "mouth" indicate the bubble domains that are replicated by the replicator 8.

Now, bubble domains "1", "3", "5"...
..., this means that after n1 = 7 bits, detector 4
injected into.

Then, r2j, r4J, r6J... pass through the replicator 9, and after n2=5 bits, the replicator 8
is replicated and injected into the detector 4 after n3=2 bits.

In this case, since nl=n2+n3 is set, detector 4 has Il'', r2j, r3j, rjJ...
・Bubble domains will be continuously injected.

Therefore, in the present invention, when the total number of bits N is an odd number, the replicator 8 may be routed after the replicator 9.

As is clear from the above description, according to the present invention, each replicator 8, 9 operates every other bit, but apparently every bit is replicated, and the bubble domain is sequentially transmitted via each replicator 8, 9. The bubbles enter the magnetic bubble injection section 10.11 of the magnetic bubble detector 4 and are sequentially electrically detected.

Therefore, by doing this, reading can be performed without passing the bubble domain twice, so the reading time can be shortened, and the storage capacity of the storage loop 6 can also be improved.
Since the detector can detect bubble information in an orderly manner, no special logic circuit is required when writing or reading information.

Moreover, since the magnetic bubble detector 4 is provided with two magnetic bubble injectors 10.11 to handle the two replicators 8 and 9, the area occupied by the magnetic bubble detector 4 is reduced, making it compact. and lower prices.

Here, in the present invention, the number of bits has been explained as n1 is 7, n2 is 5, and n3 is 2. However, the setting is not limited to this, and as long as n2 is an odd value, it can be set to any value. good.

As explained above, according to the magnetic bubble device of the present invention,
While maintaining the miniaturization and low cost of the device itself, the readout time can be shortened and the storage capacity can be improved, which is a great effect.

[Brief explanation of the drawing]

Figure 1 is a simplified configuration diagram showing an example of a magnetic bubble detector, Figures 2a and b are simplified configuration diagrams to explain the bubble domain transfer mechanism, and Figure 3 is a simplified configuration diagram to explain the replicator. , FIG. 4 is a simplified configuration diagram showing an example of a conventional magnetic bubble device, and FIG. 5 is a simplified configuration diagram showing an embodiment of the magnetic bubble device according to the present invention. 1... Chevron transfer element, 2... Magnetic bubble sensor, 3... Magnetic bubble injection unit, 4, 4a
...Magnetic bubble detector, 5, 10, 11...
...Bubble injection part, 6...Memory loop, 7,
8,9...Replicator.

Claims (1)

[Claims] 1 At least one magnetic bubble detector, a magnetic bubble injection section provided in the magnetic bubble detector, and a magnetic bubble injection section provided in a magnetic bubble transfer path and dividing a bubble domain in the transfer path. In a magnetic bubble device, the magnetic bubble injection unit and two replicators are provided, and the bit interval of each replicator is set to an odd number of bits,
and the bit interval between one replicator and one magnetic bubble injection unit is equal to the composite value of the bit interval between this replicator and the other replicator, and the bit interval between the other replicator and the other magnetic bubble injection unit. A magnetic bubble device characterized by being set to.