JPS6153797B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble memory device,
More specifically, the present invention relates to a magnetic bubble memory device that has a short read cycle time and is easy to rewrite.

BACKGROUND ART Conventionally, a major minor loop method and a block replicate method are known as magnetic bubble memory devices having a large number of information storage loops, so-called minor loop configurations.

The former is because it is necessary to read out the magnetic bubbles on the major loop transferred out from each minor loop with a detector, then make the bubble go around the major loop again, transfer it in, and return it to the original storage position on the minor loop. , has the disadvantage of long read cycle time. On the other hand, the latter adopts a method in which the magnetic bubbles to be read from each minor loop are divided, one part is left on each minor loop, the other part is guided onto the readout line, and the other is led directly to the detector and then read out and discarded. The read access time is about half of the former, but when reading each bit from a large number of magnetic bubble chips to construct a byte consisting of a predetermined magnetic bubble string,
Even if you want to rewrite only one magnetic bubble string, all the magnetic bubbles on the other minor loops that make up that magnetic bubble string must be drawn out onto the read line, so to avoid this, the byte configuration There are design limitations such as the requirement that both be placed within the same magnetic bubble chip.

The present invention has been made in view of the above-mentioned drawbacks.
The purpose is to solve the above-mentioned drawbacks of the conventional method, namely to realize a magnetic bubble memory device in which only one magnetic bubble in a magnetic bubble chip can be rewritten and the read cycle time is fast. be.

An object of the present invention is to provide a plurality of minor loops, a readout line connected to one end of each minor loop via a replicate gate, and a readout line connected to one end of the readout line and a detector connected to the other end of each minor loop, and a readout line connected to one end of each minor loop through a replicate gate, and a readout line connected to one end of each minor loop through a replicate gate, and a readout line connected to one end of each minor loop with a detector connected to the other end of the readout line. This can be achieved by forming a magnetic bubble memory device characterized by comprising a write loop connected through a direction gate and a generator connected to a part of the write loop.

The present invention will be explained below with reference to the drawings.

FIG. 1 shows an embodiment of a magnetic bubble memory device according to the present invention.

In the figure, 1 is a minor loop, 2 is a readout line, 3 is a replicate gate, 4 is a detector,
5 is a write loop, 6 is a bidirectional gate, 7 is a switching gate, and 8 is a generator.

A readout line 2 is connected to one end of each minor loop 1 via a replicate gate 3, and a detector 4 is further connected to one end of the readout line. Further, a write loop 5 is connected to the other end of each minor loop via a bidirectional gate 6.
Further, a generator 8 is connected to this write loop via another exchange gate 7. Here, it is assumed that the number of bits in each minor loop 1 and the number of bits in each write loop 5 are the same.

Next, the operation will be explained.

Writing is performed as follows.

Firstly, the magnetic bubble information generated by the generator 8 is transferred into the write loop 5 by the exchange gate 7. The magnetic bubble in the write loop 5 is further transferred into each minor loop 1 by each bidirectional gate 6, and is completed by making it possible to circulate within each minor loop.

Reading is performed as follows.

The magnetic bubbles circulating in each minor loop 1 are divided and duplicated by a replicate gate 3, detected by a detector D, and then discarded. Therefore, in the read operation, since the information in the minor loop 1 is saved, there is no need to re-storage the information, so that reading can be continued continuously without increasing the read cycle time. Moreover, rewriting of information is performed as follows.

Consider rewriting only one magnetic bubble information of a specific minor loop. In this case, first, the bidirectional gate 6 is operated to transfer the magnetic bubble information of each minor loop 1 into the write loop 5.
Next, at an appropriate timing, the generator 8 generates new magnetic bubble information to be rewritten, and when the magnetic bubble information output from the minor loop to be rewritten arrives at the exchange gate 7 (at this time, the new magnetic bubble information is also exchanged). (located at the opposite position of gate 7), new and old information is exchanged.
The magnetic bubble information in the write loop 5 is again transferred to each minor loop 1 by the bidirectional gate 6, and the rewriting is completed. At this time, the information of the other minor loops does not change at all because the information only goes to the write loop 5 once and returns to each minor loop 1 again.

In this way, according to this embodiment, while keeping the read cycle time the same as that of the conventional block replicator method, it is also possible to rewrite, for example, one magnetic bubble information of a specific minor loop, so that one byte of information can be transferred to, for example, another block replicator method. It can be configured with a magnetic bubble chip, increasing the flexibility of memory system configuration.

In the above embodiment, a generator and an eraser are used instead of the generator 8 and the exchange gate 7, and the write loop 5
The object of the present invention can be achieved in the same manner using the above configuration.

FIG. 2 shows another embodiment of the present invention, and the difference from the embodiment shown in FIG. 1 is that the write loop 5
A replicate gate 9 is provided therein, and a bias propagation path 10 connected from the replicate gate 9 to the read line 2 is provided.
This embodiment also has the following effects. That is, normally so-called data information and address information indicating the address thereof are stored in the minor loop, but in the above-mentioned embodiment, when the information is rewritten, the power is cut off and the address information is similarly transferred to the write loop 5. Therefore, other address information, that is, the address information stored in the minor loop 1, is read by the detector 4 via the replicate gate 3 and the readout line 2, and the position where the address information is lost (at this position) is detected. After detecting that the information (along with the address information is in the write loop 5), it was necessary to carry out a procedure to store the magnetic bubble information in the minor loop 1.

Therefore, in this embodiment, in order to improve this inconvenience, a replicate gate 9 is provided on the write loop 5, and the address information in the write loop 5 is directly transmitted via the bypass propagation path 10 via the replicate gate 9. It is designed to lead to the detector 4. That is, the location being written (the information for this location along with the address information is inside the write loop)
A procedure was required to store it in the minor loop after detecting it. In this embodiment, the address information in the write loop can be immediately known by operating the replicate gate 9, so there is an advantage that recovery in the event of a power cut is extremely easy. In general, a replicate gate also works as a transfer gate, so in the configuration of this embodiment, the replicate gate 9 is used as a transfer gate to function as a conventional block replication device, and the replicate gate 9 is used as a replicator, and the replicate gate 9 is also used as a transfer gate.
By not using , it can also be used as a conventional major-minor device.
Furthermore, there is an advantage that the magnetic bubble information written by the generator 8 can be immediately checked using the replicate gate 9.

As described above, according to the present invention, it is possible to realize a magnetic bubble memory device in which, for example, any one bit in a magnetic bubble chip (device) can be easily rewritten and the read cycle time is fast.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment according to the invention, and FIG. 2 shows another embodiment according to the invention. FIG. 1 shows one embodiment of the magnetic bubble memory device according to the present invention, and FIG. 2 shows another embodiment of the magnetic bubble memory device according to the present invention. In the figure, 1 is a minor loop, 2 is a readout line, 3 is a replicate gate, 4 is a detector,
5 is a write line, 6 is a bidirectional gate, 7 is a switching gate, and 8 is a generator.

Claims (1)

[Claims] 1. A readout line which is connected to one end of each minor loop via a replicate gate and has a detector connected to one end thereof, and a readout line which is connected to one end of each minor loop through a replicate gate, and to the other end of each minor loop. A magnetic bubble memory device comprising: a write loop connected via a bidirectional gate and having a generator connected to a part of the write loop. 2. The magnetic bubble memory device according to claim 1, further comprising a replicate gate disposed on the write loop and a bypass propagation path connecting the replicate gate and the detector. magnetic bubble memory device. 3. A magnetic bubble memory device according to claim 1 or 2, characterized in that the write loop is coupled to the generator via a switching gate.