JPS59221885A - magnetic bubble memory cassette - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a 6-air bubble memory cassette, and more particularly to a magnetic bubble memory cassette with improved storage reliability.

[Background of the invention]

In general, a magnetic bubble memory device includes an interface control circuit 1.0 as shown in the block diagram of FIG. *Air bubble memory device control circuit 2. Timing control circuit 3.
Magnetic Bubble Memory Device Driving Circuit Now, Magnetic Bubble Memory Device 5. A peripheral circuit section 9 consisting of a signal detection circuit 61, a rotating magnetic field drive circuit 7, a pulse 1 drive circuit 8, etc. is connected to a central processing circuit section (CPU) consisting of a microprocessor 10 and a random access memory (1?AMJ11). )1.2.

In this case, the magnetic bubble memory device 5 is composed of a magnetic bubble memory element, a pair of magnet plates for generating a bias magnetic field, a pair of coils for generating a concave rotating magnetic field, etc., and responds to instructions from the CPU 12. In addition, information is stored, read, etc.

In recent years, with the spread of the above-mentioned magnetic bubble memory device (1), there has been an increasing need for a cassette-type magnetic bubble memory that is low in price and has advantages in portability and ease of drawing. This cassette-type magnetic bubble memory has at least one component circuit other than the magnetic bubble memory device 5 among the component circuits of the magnetic bubble memory device shown in FIG. 1 above on the side of the device that receives the memory. On the other hand, the cassette type magnetic bubble memory side has at least the magnetic puzzle memory device 5 as a component, and the two complement each other to have the same function as the magnetic bubble memory device.

The cassette-shaped magnetic bubble memory configured in this way is
As shown in the narrow cutaway perspective view in FIG. 2, at least the magnetic bubble memory device 5 is mounted on a substrate 14 and mounted in a case 13 made of, for example, synthetic resin, and the end portion is A structure having a connector 15 for connecting a magnetic bubble memory device has been proposed.

However, the cassette type magnetic bubble memory having the above structure has the following drawbacks. That is,
As shown in Fig. 2, since there is an air layer inside the case 13, the thermal resistance from the heating element inside the cassette to the air outside the case 13 is large, and heat dissipation is poor, so the cassette operates in a high temperature atmosphere. There was a problem with the reliability of the characteristics.

If the magnetic bubble device 5 were accidentally operated outside the specified temperature range (fc), there was a risk that particularly important markers and defective loop information would be destroyed as contents of the memory. In a magnetic bubble memory cassette, it is not possible to directly know the ambient temperature of the bubble device from the outside. Even if the ambient temperature of the magnetic bubble memory device is within the specified range, if the magnetic bubble memory cassette is stored outside the specified temperature range, inserting it and operating it immediately will cause the memory contents to change as described above. There was a risk of it being destroyed.

[Purpose of the invention]

Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to detect when the temperature inside the magnetic bubble memory cassette exceeds a predetermined value and to activate the magnetic bubble device. This prevents the information in the bubble memory from being destroyed by not operating it. Furthermore, it also improves the heat dissipation characteristics of magnetic bubble memory devices.

[Summary of the invention]

In order to achieve this object, the present invention provides temperature detection means within the magnetic bubble memory cassette, particularly around the magnetic bubble memory device, so that the temperature in the vicinity of the magnetic bubble memory cassette exceeds a predetermined value. In addition to preventing the destruction of memory information by detecting this and disabling the magnetic bubble memory device, the device also improves the heat dissipation characteristics of the magnetic bubble memory device. It has improved reliability.

Embodiment of the present invention] Next, using the figure UIS, '0)! of the present invention will be described. : Describe the example in detail.

;l! + Figure 3 is a cutaway perspective view of the magnetic field (-t/lJ of the pull memory device) by the present invention, and the same figure as Figure 1 is the same. Explanation will be omitted.

In the figure, a bubble device 5 is located deep within the case 13.
A thermistor 16 and a posistor 17 are arranged as temperature detection elements around the , and by utilizing the change in their resistance values, the high temperature limit is determined by the posistor 17, and the low temperature limit is determined by the thermistor 16.
Detect with. As shown in FIG. 4, the detection circuit uses a comparator 18 to detect the temperature around the bubble device 5 based on changes in the voltage of the thermistor 16 and POSISTOR 17 with respect to the reference voltage 7, and locks the temperature if the temperature is outside a predetermined temperature range. The bubble operation is stopped by using the signal as a power down signal.

This can prevent the magnetic bubble memory device from operating outside the predetermined temperature range and destroying the information in the bubble memory.

FIG. 5 is a cutaway sectional view of essential parts of another embodiment of the magnetic bubble memory cassette according to the present invention, in which a gold case 219 is used in place of the synthetic resin case I3 in FIG. This case 19 is a magnetic bubble memory device 5
The heat generated from the bubble memory device 5 is efficiently radiated to the outside of the bubble cassette via the case 19, and as shown in FIG. -j It also includes the temperature detection means mentioned above. By doing this, it is possible to expand the temperature range in which the bubble device can operate normally, and also to create a highly reliable magnetic field that can prevent the memory contents from being destroyed even if the voltage is increased by mistake. A bubble memory cassette is obtained.

〔Effect of the invention〕

As explained above, according to the present invention, by providing a means for stopping the operation when the temperature inside the magnetic bubble memory cassette becomes excessive, destruction of the memory contents is prevented, and furthermore, the cassette By arranging the memory device in M-contact contact with the metal case, heat dissipation characteristics can be improved and a highly reliable magnetic bubble memory cassette can be obtained. It has a certain effect.

[Brief explanation of drawings]

Figure 1 is a block diagram of the main parts of an example of a magnetic bubble memory device, Figure 2 is a partially cut away perspective view of an example of a conventional magnetic bubble memory cassette, and Figure 3 is a diagram of a magnetic bubble memory cassette according to the present invention. FIG. 4 is a circuit diagram showing an example of the temperature detection circuit of the magnetic bubble memory cassette according to the present invention; FIG. 5 is a cutaway sectional view of the sandwiched portion shown.
Case made of synthetic resin! 6.,...Thermista, 17.
...POSISTA, 19...Metal case. 1'＼ Agent: Akio Takahashi, Patent Attorney, Yujuku, Figure 1, Figure 2, Figure 3, Figure S

Claims (1)

[Scope of Claims] 1. A magnetic bubble memory device that integrally comprises an a-bubble memory purple element, a rotating magnetic field generation coil that drives the element, and a pair of permanent magnet plates and a magnetic shunt plate that apply a bias magnetic field to the element. In the magnetic bubble memory cassette, a temperature detection means is disposed in the case, and when the ambient temperature of the magnetic bubble memory device is outside a predetermined range, the magnetic bubble is detected. A magnetic bubble memory cassette characterized in that it is configured so that a memory device does not operate. . 2. The magnetic baffle memory cassette as set forth in claim 4, wherein the Mσ case is made of gold and has an A-14 structure that directly contacts the magnetic bubble memory device.