JPS6360480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble memory device, and more particularly to a magnetic bubble memory device in which malfunctions, defective characteristics, etc. can be easily determined.

In general, the loop configuration of a magnetic bubble memory device includes a single loop configuration and a mager-minor loop configuration, and the mager-minor loop configuration further includes a transfer gate type, a block replicator transfer type, and a block replicator swap type. The transfer gate method has a major loop, and the characteristics of this loop can be determined by separating it from the minor loop. On the other hand, the block replicator transfer method and the block replicator swap method have a write mager line and a read mager line, but the operation of these mager lines cannot be separated from the operation of the minor loop in principle. . For this reason, the detection method for detecting defective parts of elements has been extremely complicated. That is, when a malfunction or characteristic defect of an element occurs, it is not possible to easily determine where the cause is.

FIG. 1 is an enlarged plan view of essential parts of an example of a conventional magnetic bubble memory element. In the figure, 1 is a magnetic bubble detection section, 2 is a read mager line, 3 is a minor loop, 4 is a write mager line, 5 is a generator gate where magnetic bubbles are generated, and 6 is a gate section.

In the magnetic bubble memory element configured in this way, the magnetic bubble generated at the generator gate 5 is transmitted from the write mager line 4 to the gate section 6 to
The data is transferred in the order of minor loop 3 → gate section 6 → read mager line 2 → detection section 1.

However, in the magnetic bubble memory device having the above configuration, as is clear from the figure, the write mager line 4, the gate portion 6, the minor loop 3, and the read mager line 2 are connected in series between the generator gate 5 and the detecting portion 1. Therefore, when a defect such as a malfunction or a characteristic defect occurs in the magnetic bubble memory element, it is not possible to easily determine where the defect occurs.

Therefore, the present invention provides a magnetic bubble memory element that eliminates the above drawbacks by newly providing a generator gate in a part of the readout mager line, thereby making it possible to easily identify defective locations even during mass production. is intended to provide.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is an enlarged plan view of essential parts showing an example of the magnetic bubble memory element according to the present invention, and since the same symbols as in FIG. 1 represent the same elements, a description thereof will be omitted. In FIG. 2, a generator gate 7 for generating magnetic bubbles is connected in series with a generator gate 5 for writing to the mager line 4 in a part of the read mager line 2, for example, at the starting point of the mager line 2. It is being The magnetic bubbles generated at the generator gate 7 are transferred to the detection unit 1 via the readout mager line 2 and read out by the detection unit 1.

According to such a configuration, the mager lines such as the read mager line 2 and the write mager line 4 can be operationally separated from the minor loop 3 for storing magnetic bubbles, so that the detection unit 1 and the read mager line 2 can be separated from each other. Characteristics can be measured without being influenced by the minor loop 3, write major line 4, and gate section 6. In this case, the generator gate 7 is arranged in the opposite direction compared to the original generator gate 5, as shown in an enlarged plan view of the main part in FIG. Therefore, even if they are connected in series, there is no adverse effect on the operation of the element, and they can be used selectively by simply changing the various bit constants. Therefore, the number of wiring pads does not increase, and
This is possible in the conventional manner.

In the above embodiments, the magnetic bubble memory chip uses a block replicator transfer method, but the present invention is not limited to this, and may be used for coupling with a minor loop such as a block replicator swap method. Even when applied to a magnetic bubble memory chip in which a write function is added to a mager line that does not have a transfer function, the same effect as described above can be obtained.

As described above, according to the present invention, when a malfunction or characteristic defect of an element occurs, it is possible to quickly determine whether the cause exists in the readout major line, the detection section, or the minor loop. In addition, it becomes possible to evaluate the characteristics of the detection section and the mager line, and an extremely excellent effect can be obtained in that a magnetic bubble memory element that is excellent in defect countermeasures, testing, etc. can be realized.

[Brief explanation of the drawing]

FIG. 1 is an enlarged plan view of essential parts showing an example of a conventional magnetic bubble memory element, FIG. 2 is an enlarged plan view of essential parts showing an example of a magnetic bubble memory element according to the present invention,
FIG. 3 is an enlarged plan view of a main part showing an example of a pattern of a generator gate related to a magnetic bubble memory element according to the present invention. DESCRIPTION OF SYMBOLS 1...Detection part, 2...Read mager line, 3...Minor loop, 4...Write mager line, 5...Generator gate, 6...Gate section, 7...Generator gate.

Claims (1)

[Claims] 1. A magnetic bubble memory element comprising a write mager line 4, a minor loop 3, a read mager line 2, and a magnetic bubble detector 1 connected to the read mager line, the control conductor of which is connected in series. There are first and second bubble generators 5, 7 connected and arranged in opposite directions to each other, the first generator 5 in the write mager line 4 and the second generator 7 in the read mager line. A magnetic bubble memory element characterized in that it is connected to Meijer Line 2.