JPS58185086A - Magnetic bubble storage element - Google Patents

Abstract

PURPOSE:To attain a large capacity and high performance of a magnetic bubble storage element, by providing a magnetic bubble eraser made of a conductor to the lower layer of a magnifier made of ''Permalloy'' and flowing a current pulse to the eraser after in detection to erase the expanded magnetic bubble. CONSTITUTION:A transferred magnetic bubble 1 arrives at a chevron magnifier 2 made of ''Permalloy'' to be expanded and is detected by a detector via a magnifier 21. The detected magnetic bubble is transferred to a subsequent chevron magnifier 22 and reaches the center part of a hairpin-shaped eraser 4 made of a conductor pattern. Then a current pulse is supplied to the eraser 4 to reduce and erase the expanded magnetic bubble. This eliminates the guard rail of the detector 3 and increases the degree of designing freedom to attain a large capacity and high performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to magnetic bubble storage elements and to improvements in magnetic bubble detector area.

One of the functional parts that are components of the magnetic baffle storage element
The essential thing is a detector. The detector used to read stored information usually uses a magnetoresistive element that detects the leakage magnetic field from the magnetic bubble, but a single circular magnetic baffle cannot obtain a magnetic field sufficient for detection. Because this is not possible, the length of the magnetic bubble must be enlarged in advance to be several hundred times the diameter of the magnetic bubble before it can be detected. Since the detection output increases in proportion to the magnifier of the magnetic bubble, it becomes possible to obtain a practical detection output by expanding the magnetic bubble. After detection, the expanded magnetic bubble is rejected outside the guardrail.

FIG. 1 is a block diagram of a conventional magnifier and detector (hereinafter referred to as the detector area) of a magnetic baffle storage element, and the magnetic bubble transferred from the transfer path 1tl enters the expander 2 and is expanded. Detected by detector 3.

After being detected, it is rejected outside of Gert Rule 4.

As can be seen from Fig. 1, a guardrail 4'i is required to reject the magnetic bubble expanded by the detection hot flame, and therefore the position of the detector area within the element is restricted, and it cannot be placed around the element. I had no choice. However, as storage elements become larger in capacity, their architectures become more diverse. For example, in order to achieve high-speed readout, it is necessary to install a detector at any position within the element. - A detector area that does not require a trail must be realized.

If this can be achieved, the degree of freedom in element design will increase and it will be possible to prevent performance deterioration due to increased capacity.

It is an object of the present invention to provide a magnetic bubble storage element with a detector area that does not require guardrails.

In the present invention, a magnetic bubble extinguisher made of a conductive material is installed in the lower layer of an expander made of a permalloy pattern such as a Vi Chevron expander, and after detection, 11 current pulses are applied to this extinguisher to extinguish the expanded magnetic bubble. This is achieved by:

The present invention will be explained below using the drawings. FIG. 2 is a block diagram showing a detector area of an embodiment of a magnetic bubble storage element according to the present invention. The nine magnetic bubbles transferred from the right direction in Figure 2 through the transfer path 1 at a transfer period of 10μ2 reach the expander 2, which is a 50-stage chevron made of a permalloy pattern, and begin to expand sequentially and finally expand; The image is enlarged by 30 minutes, reaches the detector 3, and is detected. The detected magnetic bubble is transferred to the subsequent chevron expander 22, and when it reaches the center of the hairpin-shaped annihilator 5 made of a conductive pattern,
A current pulse with a width of 3 μm is applied to the annihilator 4 so that the vertical bias magnetic field in the core becomes large. #The magnetic bubble that was expanding due to the current pulse shrinks and disappears.

FIG. 3 shows the timing within the cycle of the functional units related to this series of operations. FIG. 3 shows the temporal relationship between the rotating magnetic field, the detection output waveform, the detection strobe pulse, and the current pulse flowing through the annihilator 5 in the above embodiment, and a, b, respectively in this order.
, c and d.

As explained above, conventionally a guardrail was required to reject detected magnetic bubbles, but according to the present invention, a guardrail is no longer necessary in the detector area by providing an annihilator made of a conductor. It is possible to place the detector at any position within the memory element. As a result, the degree of freedom in designing the layout of large-capacity, high-performance magnetic bubble memory confectionery increases, which is industrially beneficial.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a detector area used in a conventional magnetic bubble storage element, FIG. 2 is a configuration diagram of a detector area in a magnetic bubble storage element according to an embodiment of the present invention, and FIG. 3 is a configuration diagram of a detector area used in a conventional magnetic bubble storage element. FIG. 3 is a diagram showing the temporal relationship of the driving states of the magnetic bubble storage element of the example. In addition, in the figure. 1... Transfer path, 2, 21, 22... Magnifier, 3... Detector, 4... Guardrail, 5... It is an extinguisher.

Claims (1)

[Claims] A magnetic bubble storage element comprising at least a magnetic bubble expander and a detector, comprising a permalloy pattern! ! The magnetic bubble magnified by the TI magnifier and detected by the detector is extinguished by an annihilator consisting of a conductive pattern/pattern placed in the lower layer of the magnifier located subsequent to the spindle detector. A magnetic bubble memory element.