JPS5947386B2 - magnetic bubble device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a magnetic bubble device, and in particular to an improvement in the structure of a magnetic bubble device as a cassette type in which a storage medium can be carried separately from a main device consisting of a drive circuit, a reading circuit, etc. It is something.

Devices using magnetic bubbles that use magnetic bubbles to store information, perform logical operations, etc. have various characteristics such as non-volatility, high storage density, low power consumption, small size and light weight, and even completely eliminate mechanical elements. Since it is a solid-state device that does not contain any substances, it has very high reliability, and therefore, there are great expectations that it will be used in the future as a memory for terminal devices. Particularly when a magnetic bubble is employed as a storage medium for a terminal device memory, such as a portable data recorder, the most important feature among the above-mentioned characteristics is that it is small and lightweight. Against this background, a system has recently been devised in which the storage medium is separated from the main unit consisting of a drive circuit, a reading circuit, etc. to form a cassette type, and a magnetic bubble cassette with a small storage capacity can be optionally attached and detached as needed. This cassette type system allows information to be easily carried around, and due to the nature of magnetic bubbles, a relatively large amount of information can be stored in a compact case, so data can be input directly to the central processing unit at the site where the data is generated. It is possible to create information and is expected to be even more effective in improving the efficiency of administrative processing. FIG. 1 is a diagram for explaining one circuit configuration of a magnetic bubble cassette used in this type of system.

In the figure, 30 indicates a magnetic bubble cassette, and 40 indicates a main unit. Reference numeral 1 denotes a magnetic bubble chip, which includes functional parts such as a magnetic bubble generator G, a divider SP, a detector S, and an eraser A.

The figure shows a single loop configuration. 3 is a connector, and 7 is a rotating magnetic field generating coil consisting of an X coil and a Y coil arranged to cover the magnetic bubble chip 1.

41 is a connector corresponding to the connector 3 on the cassette 30 side, 42 is a coil drive circuit for supplying a sine wave current and a cosine wave current to the coil 7 to generate a rotating magnetic field along the surface of the magnetic bubble chip, and 43 is a magnetic circuit. A bubble reading circuit 44 is a magnetic bubble control unit which includes a magnetic bubble generator G, a divider SP,
It controls various functional parts such as the detector S and the eraser A.

Reference numeral 45 denotes a control circuit for controlling the coil drive circuit 42, magnetic bubble reading circuit 43, and magnetic bubble control section 44 based on command signals from the central processing unit.

Further, 46 is a register, and 47 is a current circuit. With this configuration, a power set type storage unit that uses a relatively small-capacity, portable magnetic bubble as a storage medium can be connected to the main unit via a connector and operated as necessary. . FIG. 2 is an exploded perspective view of a magnetic bubble cassette 30 used in this type of system. In the figure, 1 is a magnetic bubble chip, 2 is a substrate on which the chip 1 is mounted, and 3 is a main unit that provides information and power necessary to drive the chip 1 according to the 4C rule, and also provides information read from the chip 1 to the main unit. The connectors 4, 5, and 6 provided at the end of the board sending out to the 40 side are magnetic circuits for generating a bias magnetic field perpendicular to the chip 1, and each shows a bias magnet, a ferrite keeper, and a permalloy yoke. ing. Reference numeral 7 denotes a rotating magnetic field generating coil for driving the magnetic bubble within the chip 1.

8 is a shielding case for preventing the influence of external magnetic fields on the magnetic bubble chip.

The magnetic bubble cassette constructed in this manner is inserted into the female connector 41 on the main unit 40 side in FIG. It is electrically connected to the bubble, reading circuit, etc.

Power set 30. The rotating magnetic field generating coil 7, which forms part of the coil 7, is composed of an Generates a circular rotating magnetic field locus in the in-plane direction. Magnetism inside chip 1. The bubble is
In response to this rotating magnetic field, the signal is transferred onto a transfer path made of a determined permalloy pattern, etc., and subjected to magnetoelectric conversion by a magnetic bubble detector provided in the chip 1. This electrical signal is then sent as a read signal to the magnetic bubble reading circuit 43 on the main unit 40 side via the connector 3. The above is an explanation of the reading operation, but the writing of information is also performed in the same way, and the electrical signal to be written in C is sent from the main device side to the magnetic bubble generator G in the chip 1 via the connector 3.
is supplied to write the desired data. Now, this type of magnetic bubble cassette has a relatively complex structure and is heavier than magnetic tape cassettes, etc., so there is still room for improvement in terms of the cassette type's inherent lightness and ease of carrying. left behind.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to realize a magnetic bubble cassette which has a simple and lightweight structure and is easy to carry. Another object of the present invention is to realize a magnetic bubble cassette that is inexpensive and can be expected to have further improved reliability. The object of the present invention is to provide a magnetic bubble cassette comprising a board on which a magnetic bubble chip is mounted and a part of which has a connector for external connection, a shield case that covers the board and the magnetic circuit, and a rotating cassette for driving the bubble chip. A main unit having a magnetic field generating coil and a connector connected to a bubble control peripheral circuit, and when the bubble cassette is inserted into the main unit, both connectors are connected and the coil is connected to the board. ℃ can be achieved by providing a magnetic bubble device characterized in that the bubble chip is inserted between the magnetic circuits and becomes in a driving state.

3 and 4 are cross-sectional views of one embodiment of the magnetic bubble device according to the present invention.

In each country, 11 is a magnetic bubble chip 11, 12 is a board on which chip 11 is mounted, 13 is a connector attached to the edge of the board, and 14 and 16 are magnetic circuits for generating a bias magnetic field perpendicular to chip 11. , shows bias magnet and permalloy yoke, respectively. 18
is a shielding case to prevent the negative influence of external magnetic fields on the magnetic bubble chip.

Note that 19 is a protective member for sealing the entire substrate 12 including the chip 11, and is formed by, for example, resin molding. Further, as is clear from FIG.
A rotating magnetic field generating coil 4V for supplying an in-plane rotating magnetic field to the magnetic bubble cassette 1 is a connector provided on the main unit 40'' side corresponding to the connector 13 on the magnetic bubble cassette 30'' side. As is clear from both figures, in the present invention, when the magnetic bubble cassette is in a normal storage state, that is, in a non-driving state, an unnecessary rotating magnetic field generating coil is removed from the main body device 40.
It is characterized by being installed on the '' side.

That is, the rotating magnetic field generating coil, which is used only in the driving state, is removed from the force set side and placed on the main unit side, thereby further simplifying the structure of the force set and reducing its weight. The rotating magnetic field generating coil 17 disposed on the main body device 40' side must be open at least in the direction in which the force set is inserted, and preferably an X coil,
A planar coil in which Y coils are stacked is suitable.

Various embodiments of the rotating magnetic field generating coil applied to the present invention are shown in FIGS. 5a to 5d. Figure a- shows a method for driving magnetic bubbles by using two sets of laminated X coils and Y coils made of planar coils, and inserting a substrate on which a magnetic bubble chip is mounted into the gap between each set. This is to obtain the necessary rotating magnetic field. In addition, figure b shows a combination of a planar coil and a solenoid coil, and figure c shows a combination of two plane coils and one bent plane coil as shown. . In addition, as shown in Figure d, a stacked X coil and a Y coil consisting of planar coils 1
It is also possible to obtain the same effect as shown in FIG. 3A by preparing a set of magnetic bubble chips and using the magnetic bubble chip mounting substrate 12 in FIGS. 3 and 4 as a conductive plate 12' and utilizing the image phenomenon. Of course, it is also possible to combine various configurations of a to d in the figure. The arrows in each figure indicate the magnetic bubble cassette 30'.
indicates the direction in which it will be inserted. That is, a coil for generating a rotating magnetic field as shown in each figure is provided on the main unit side, and this coil is inserted between the protective member 19 of the force set and the permalloy yoke 16, which are attached as shown in FIG. Therefore, the rotating magnetic field necessary to drive the magnetic bubble can be supplied to the magnetic bubble chip on the substrate. As explained above, according to the present invention, it is possible to realize a magnetic bubble cassette that has a simple structure and is therefore extremely light.

In addition, since it is not necessary to provide each magnetic bubble cassette with a coil for generating a rotating magnetic field, it is inexpensive, and since the coil, which is a factor in the variation in the characteristics of the entire force set, is removed, magnetic bubbles with uniform characteristics can be produced. You can get a cassette. Furthermore, according to the magnetic bubble device of the present invention, since the coil for generating the rotating magnetic field is directly attached to the main unit, the number of terminals of the connector on the force setting side can be reduced. Reducing the number of connector terminals leads to improved reliability of the device, and the present invention has a significant effect in this respect as well.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining one circuit configuration of the magnetic bubble cassette system, and FIG. 2 is an exploded perspective view of the magnetic bubble cassette.

Claims (1)

[Claims] 1. A magnetic bubble cassette comprising a board on which a magnetic bubble chip is mounted and a part of which has a connector for external connection, a shield case that covers the board and the magnetic circuit, and a rotating magnetic field generator for driving the bubble chip. a main body device having a coil and a connector connected to a peripheral circuit for bubble control, and when the bubble cassette is inserted into the main body device, both the connectors are connected,
A magnetic bubble device characterized in that the coil is inserted between the substrate and the magnetic circuit to bring the bubble chip into a driving state.