JPS6158917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble memory element using an odd-even method.

Conventionally, the major-minor loop method has been commonly used to construct magnetic bubble storage elements using magnetic bubbles, but it lacks reliable storage of information and is prone to power outages during major loop transfer of magnetic bubbles. However, when a stop operation is performed, the information becomes volatile. Therefore, a two-measure line method using a block replicator was considered, and this problem was solved, and an ODD-EVEN method with further improved characteristics was proposed, which is a magnetic bubble memory element with twice the data transfer rate of the conventional method. was realized and is now in widespread use. Details of the odd-even method are described in US Pat. No. 4,075,611.

FIG. 1 is a block diagram of a conventional odd-even system. The information written into the minor loops 31, 32 by the generator 1 and the write gate 2 is divided by the block replicate gate 4 and sent via the read lines 51, 52 to the detectors 61, 62.
Detected by One detector 61 and one detector 62 are independently provided on each of the odd side 101 and the even side 102. In each of the figures below, the right side is the odd side and the left side is the even side, and the number of cycles of the rotating magnetic field required for the magnetic bubble to reach the detector is one less on the odd side. The configuration shown in Figure 1 has two stretchers and detectors (hereinafter referred to as the detector area), and also requires two sense amplifier systems, which is a disadvantage in that the area of the detector area becomes large. have. Figure 2 is a configuration diagram of another odd-even system, with the odd side 101,
Since the magnetic bubbles transferred from the even side 102 merge at the transfer path junction 7 and are detected by one detector 63, the drawbacks of the configuration shown in FIG. 1 are solved. However, compared to the one shown in FIG. 1, there is a new drawback that the number of bits reaching the detector 63 increases and the access time becomes longer.

An object of the present invention is to eliminate the drawbacks of the configurations shown in FIGS. 1 and 2 and to realize a high-performance magnetic bubble memory element having only the advantages. That is, the object of the present invention is to provide an odd-even type magnetic bubble storage element having only one detector area without increasing the access time.

In the magnetic bubble storage element according to the present invention, which is an odd-even type magnetic bubble storage element having one detector area, odd-side data is entered from the end of the detector area near the odd-side leading data position or from the vicinity thereof. The even-side data is detected by entering from the end of the detector area close to the even-side head data position or the vicinity thereof.

Next, details of the present invention will be explained using examples. FIG. 3 is a block diagram of a magnetic bubble storage element according to the present invention. This device uses an even system and has a capacity of 256K bits, with minor loops 31 and 32 consisting of 1024 bits on the odd side 101.
128 pieces, 128 pieces are provided on the even side 102. The difference from the configuration in FIG. 2 is the Otsudo side 101,
The confluence point 7 of the magnetic bubbles that have transferred both readout lines 51 and 52 on the even side 102 is located in the detector area 6, and furthermore, the inlet 91 and 9 of the detector area 6
2 is at both ends. That is, the odd side data enters the right end of the detector area 6, the even side data enters the left end, and the respective data are merged at the center 7 of the detector area 6 and detected. Furthermore, since the length of the detector area 6 is made approximately equal to the interval between the leading data position 301 on the odd side and the leading data position 302 on the even side, the number of bits transferred up to the detector area entrances 91 and 92 is extremely small. Can be made smaller. In this embodiment, the number of bits transferred from the leading data position 301 on the odd side to the detector 64 is 8 bits, and 9 bits on the even side. The number of bits transferred from the detector area entry ports 91 and 92 to the detector 64 is the same as that of the configuration shown in FIG. From the relationship of domain wall speed compared to 2
Requires twice the number of bits. That is, the configuration of FIG. 2 requires only 16 bits, but the configuration according to the present invention requires 32 bits. However, in the configuration shown in FIG. 2, since the data enters from the center of the detector area 6, the number of transfer bits from the front side leading data position 301 to the detector area entry port 9 is 128 bits larger than in the configuration according to the present invention. . Therefore, from the head data position 301 on the odd side, the detector 63 or 64
The number of bits to be transferred up to now requires 152 bits in the configuration shown in FIG. 2, but only 40 bits in the configuration according to the present invention. Therefore, with 300KHz drive, the average access time of the configuration shown in Figure 2 is 2.19msec, but the configuration according to the present invention requires only 1.82msec, which is about 17.
% reduction in access time has been achieved.

FIG. 4 is a diagram showing one example of a detailed pattern of the detector region and its entrance among the functional parts of the magnetic bubble storage element shown in FIG. 3. The data on the original side is further transferred and enters the detector area 6 through the entry port 91. The even side data is transferred to the detector area 6 through the inlet 92.
Enter. The detector 64 comes from the entrances 91 and 92.
It is arranged in the 24th column (C24), and the odd side and even side data are arranged in the 12th column (C12).

As explained above, the magnetic bubble element according to the present invention can significantly improve the access time, and
Since two detectors are used, there is an advantage that only one sense amplifier system is required, and a high-performance, low-cost magnetic bubble memory element can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional odd-even magnetic bubble memory element, FIG. 2 is a block diagram of another conventional odd-even magnetic bubble memory element,
FIG. 3 is a block diagram of an embodiment of the odd-even type magnetic bubble storage element according to the present invention, and FIG. 4 is an enlarged view of the detector area and the vicinity of its entrance of the magnetic bubble storage element used in the embodiment. 1... Generator, 2... Write gate, 31,3
2... Minor loop, 4... Read gate, 5
1, 52...readout line, 6...detector area,
61, 62, 63, 64...detector, 7...merging point, 81,82...writing line, 9/91,92
...Detector area entrance, 101...Other side area, 102...Even side area, 301...Other side first data position, 302...Even side first data position.

Claims (1)

[Claims] 1. In a magnetic bubble storage element using an odd-even system equipped with a detector area, the odd-side data is stored in the detector so that the odd-side data and the even-side data enter separately into both ends of the detector area without merging. The detector is characterized in that the even-side data is detected by entering the detector area from an end close to the even-side leading data position of the detector area or from its vicinity, and detecting the even-side data by entering from the end close to the even-side leading data position of the detector area or its vicinity. magnetic bubble memory element.