JPS6031032B2 - magnetic bubble device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic bubble device that can simplify the timing control circuit.

A magnetic bubble device, for example, a bubble memory, as shown in FIG.
, a large number of bubble processing elements such as transfer gate 5 (
(hereinafter simply referred to as a gate).

Figure 1a shows a major-minor type bubble memory, where 6 is a major loop, 4 is a large number of minor loops, 4 is a detector, and 1 to 15 are conductors that supply control current to each gate. . Figure b shows a single-loop type bubble memory, which is different from the major-minor type bubble memory except that the loop consisting of the array of magnetic patterns for bubble propagation is one closed loop 8, regardless of whether it is major or minor. There is no difference. Note that in FIG. 1b, illustrations of the detector, conductors, etc. are omitted. By the way, these gates have their own optimal operation timing, depending on the design. For example, in the case of a generator, the timing is 1400.
, 1200 for Annihilator, 1 for Replicator
900, if it is a transfer gate, when it is 90o or 270o (rotation driving magnetic field), when a pulse current is passed through the conductors 11, 12... to operate, bubbles are generated, erased,
Division, propagation path switching, etc. can be performed as desired,
If current is passed at a frequency other than that, the desired operation may not be performed or malfunction may occur.

Therefore, a timing control circuit is provided to conductor 1, 12,
It is necessary to control the timing of coupling the current to the above values correctly, but this complicates the device and increases cost. The present invention improves this point and changes the arrangement of the gates so that the timing is 00,
The aim is to simplify and reduce the cost of the device so that easily obtained values such as 900, 180o, 270o etc. are sufficient.

That is, the present invention provides a magnetic bubble device comprising a bubble propagation path and a plurality of bubble processing elements disposed in the propagation path and receiving and integrating current pulses to generate and eliminate bubbles, etc. The bubble processing element and the bubble propagation path in its vicinity are arranged in such a way that the timing of the current pulse with respect to the bubble driving magnetic field is all an integral multiple of 900. This will be explained in detail. FIG. 2 is a diagram illustrating and explaining the timing relationship of the conventional gate pulse with respect to the bubble-driving rotating magnetic field, in which 1 is a generator, 2 is an annunciator, 3 is a replicator, 4 is a diagram when a bubble is transferred from a major loop to a minor loop, and 5 shows the phase of each drive current pulse of the transfer gate when transferring the bubble from the minor loop to the major loop.

The reason why each gate current has an optimum phase in this way is due to its relationship with the bubble propagation pattern, and if the gate is not operated in the driving magnetic field phase where a bubble exists or may exist at the gate engagement position of the propagation pattern, the desired phase cannot be achieved. Due to inability to perform movements. For example, FIG. 4a shows the generator section,
21 is a bubble propagation path mainly consisting of a half-disk magnetic pattern, and 22 is a conductor pattern of a generator that generates bubbles by the nucleation method. 23 is the T,1 pattern, and the conductor pattern 2
2, and serves to reliably transfer the bubbles generated by the pattern 22 to the half-disk bubble propagation path 21.

This generator pattern is also the same as the transfer gate pattern (it is of a shared type), and therefore a half-disc pattern 21a is also provided for passing between the major and minor loops. Day. is a bias magnetic field, which is applied perpendicularly to the baffle magnetic substrate from the back surface toward the front side in the drawing. In this device, when the bubble-driving rotating magnetic field Ho rotates in the anti-Japanese direction as shown in Figure 4c, the bubble moves in the direction of the anti-Japanese clock as shown in Figure 4a. The bubble propagates along the bubble propagation path in the direction of the arrow. In the T pattern 23 that intersects with the conductor pattern 22, bubbles propagate in the order of ■, ■, ■, ■, etc. shown in the figure, and bubble generation due to nucleation is caused by flowing current i to the hairpin-shaped conductor shown by ■. It occurs inside the U-turn part of pattern 22,
, the phase that comes to the bubble position ■ is 180o) 1400o in front
is the optimal phase for flowing gate current i. If this phase is shifted, bubbles will be generated but not propagated as desired, causing errors. However, a phase of 1400 is difficult to create, and the timing control circuit becomes complicated.

Improve this point and 9 such as 00, 900, 1800...
These phases are easy to create if they can be made an integral multiple of 00 (for example, if the bubble drive magnetic field Ho is a rectangular rotating magnetic field as shown in the figure, the excitation current supply switching circuit is switched with a pulse train to complete the operation, oo, 9 pins). , 18 and so on, the timing control circuit becomes simple because the timing of an integer multiple of 900 can be directly obtained as a pulse of the pulse train.By the way, the phase of 1400 is a bubble, as is clear from the above explanation. It is an angle determined by the position and therefore the driving magnetic field and the propagation pattern.Since the driving magnetic field is common to all gates and propagation paths on the bubble chip, this is the base, and the driving magnetic field of the propagation pattern or the mounting angle with respect to the magnetic substrate is It can be seen that by changing the phase, the phase of 1400 can be changed to a phase of 1800, etc.
FIG. 5 shows an embodiment of the present invention, in which the propagation pattern 21 is tilted only at the gate portion by a desired angle Qo, and the conductor pattern 22 is also tilted accordingly.

Note that the conductor pattern 22 can also be kept in the same vertical position as in FIG. 4, and this will not cause any problem in bubble generation and propagation, but as is clear from the drawing, it may cause problems such as crossing other patterns 21a, etc. There is a risk that this may occur. In the case of the generator, if Q = 400, the time when the bubble reaches the bubble generation position (■) will be 1800-400, and the phase at which the gate current i flows through the conductor pattern 22 will be 1800, which is 40 degrees earlier than that, which is an integral multiple of the desired 900. It can be a phase angle. The same applies to annularizers and the like, and FIG. 3 shows the gate current timing of the present invention whose phase has been corrected in this way. 1 to 5 in FIG. 3 correspond to 1 to 5 in FIG. 2. As explained in detail above, according to the present invention, the gate current generation timing can be made an integral multiple of 90°, which is easily obtained, by a simple means of framing the gate and the bubble propagation path in its vicinity, and the timing can be controlled. The circuit can be simplified.

[Brief explanation of drawings]

Figures 1a and b are explanatory diagrams showing the structure of the bubble memory;
3 and 3 are time charts showing the timing of the gate current of the conventional and the present invention, FIG. Figures a, b, and c are explanatory diagrams of the configuration of the generator section, gate current timing, and rotating magnetic field of the present invention. In the drawing, numerals 6 to 8 and 21 are bubble propagation paths, and numerals 1, 2, 3 and 5 are bubble processing elements. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a magnetic bubble device comprising a bubble propagation path and a plurality of bubble processing elements arranged in the propagation path and supplied with current pulses to perform bubble generation, erasure, etc., bubble drive of current pulses supplied to these bubble processing elements. A magnetic bubble device characterized in that the bubble processing element and the bubble propagation path in the vicinity thereof are tilted and arranged so that the timing with respect to the magnetic field is an integral multiple of 90°.