JPH01237991A - Preheating system for magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To execute the preheating for respective devices and to save an energy consumption by sensing a device number operated next to a bubble memory device during the present action with a processor beforehand and detecting the temperature of respective bubble memory devices with a temperature sensor. CONSTITUTION:Temperature sensors T0, T1 and T2 and a preheating means are provided for plural bubble memory devices B0, B1 and B2 and the temperature of the devices B0, B1 and B2 during the present driving detected by respective sensors T0, T1 and T2 is inputted through a temperature detecting circuit 2 to a processor 4. In the processor 4, the device number and the temperature driven next to the device B0 during the present driving can be sensed. When the device B0 is driven, concerning a device driven next a signal LT supervises whether the temperature to need a preheating is obtained or not, based on the information from the circuit 2 and when the preheating is necessary, a preheating signal PH is outputted to a controller 3 and a device number is inputted through a selecting circuit 1 to the said device.

Description

[Detailed Description of the Invention] [Required] Regarding a preheating method in a magnetic bubble memory device that stores and transfers information by controlling magnetic bubbles, the power consumption for preheating the device of the magnetic bubble memory device is small; With the aim of realizing a pre-1 method that does not require waiting time for access, in an air bubble memory device that controls a plurality of bubble memory devices, a temperature detection means and a temperature detection means are provided for each bubble memory device. In addition to providing a preheating means, when the following conditions are met for a device other than the bubble memory device currently being driven, at least the temperature requires preheating, and the device is the next device to be driven. The structure is such that the breheating means is controlled to operate.

[Industrial application field]

The present invention relates to a preheating method in a magnetic bubble memory device that records and transfers information by controlling magnetic bubbles.

[Conventional technology]

Magnetic bubble memory devices control the generation, transfer, division, expansion, detection, erasure, etc. of magnetic bubbles.
Information is stored, input and output.

However, in order for these operations to be carried out reliably, it depends on the ambient temperature conditions, and the device can function accurately without malfunctioning only within a range of, for example, about O'C to 55°C.

Therefore, as described in Japanese Patent Publication No. 61-17069, when the ambient temperature is low, preheating is performed by energizing one of the coils behind the X and Y coils for generating the rotating magnetic field. It is known to heat each bubble memory device so that it is maintained at an operational temperature.

At this time, if the device is equipped with only one bubble memory device, operate the device alone from Pre-1 to
is accessing.

However, in reality, multiple bubble memory devices are often installed in the same device. For example, when four bubble memory devices are installed in the same device, there is a method of preheating all four bubble memory devices at the same time, or preheating each bubble memory device individually.

[Problems to be Solved by the Invention] If all four devices are preheated at the same time, the preheating current will be enormous and a large capacity power supply will be required. On the other hand, when preheating a single device, a small capacity power supply is sufficient, but if the next device to be accessed has not completed preheating, the next device cannot be accessed immediately and a standby time is required. Become.

The technical problem of the present invention is to solve these problems in the conventional preheating method of magnetic bubble memory devices, and to realize a preheating method that consumes less power for preheating and does not require waiting time for access. It is in.

[Means to solve the problem]

FIG. 1 is a diagram explaining the basic principle of the preheating method according to the present invention. BO, Bl, B2, . . . are bubble memory devices, each of which is selected and operated by a selection signal from the device number selection circuit 1. T
o, TI, T2... are each device BO, Bl, B
This is a temperature sensor that detects the temperature of 2... and manually inputs it to the temperature detection circuit 2. In addition, each bubble memory device BO, B
1, B2, and B3 have heating means.

A controller 3 selects a device to be bubble driven or preheated and controls information transfer via the device number selection circuit 1 according to instructions from the processor 4.

[Effect]

Now, according to a command from the processor 4, the controller 3
, it is assumed that the #0 bubble memory device BO is selected and driven by the device number selection circuit 1.

In the processor 4, the device number to be driven next to the bubble memory device BO currently being driven is known in advance. Also, each pull memory device 80. Bl,
The temperature of B2... is measured by temperature sensors TO1T1, T2...
The temperature is detected by the temperature detection circuit 2 and can be monitored on the processor 4 side.

Therefore, when a certain bubble memory device BO is being driven, the temperature detection circuit 2 for the next device to be driven is
Based on the information from the signal LT, monitoring is performed to determine whether the temperature is such that preheating is required. If the temperature is such that preheating is required, a preheating signal circle 1 is output to the controller 3, and the controller 3,
A preheat signal is input to the device through the device number selection circuit 1, and the breheating means of the device is driven.

When the temperature rises sufficiently due to preheating and preheating is no longer necessary, the preheating signal is turned off in accordance with the signal from the temperature detection circuit 2.

By repeating these operations, the temperature of the next device to be driven is monitored, and if it becomes lower than the temperature at which it can operate normally, a breathing operation is performed based on the temperature information from the temperature detection circuit 2. The device is maintained at a temperature at which it can be operated at all times.

Therefore, when the device is accessed, it can be accessed immediately, and high-speed access can be performed without requiring waiting time as in the conventional case.

〔Example〕

Next, how the breathing method of the magnetic bubble memory device according to the present invention is actually implemented will be explained using an example. FIG. 2 is an embodiment of a circuit implementing the breathing method of a magnetic bubble memory device according to the present invention. In this embodiment, the bubble memory devices are BO, Bl, B2, B3.
As shown, there are 4 installed.

Each bubble memory device BO1131, B2, B3 has a temperature detector such as a thermistor, and the output terminal 1t... of the temperature detector of each bubble memory device BO, Bi B2, B3 is 2 temperature detection circuit 21
．． 22, the temperature detection circuit 2
The output signals LTO and LTI of 1.22 are input to the processor 4. ' The selection signal output terminal 5 of the device number selection circuit 11 is directly connected to the drive selection terminal C5 of each bubble memory device BO1B1, B2, B3, while the OR circuit 61
．． 62..., via AND circuits 71, 72...
It is connected to the bubble heat signal terminal ph of each bubble memory device BO, Bl, B2, B3.

Of the two preheat signal lines connected to the processor 4, one of the signal lines 8 is connected to the OR circuits 61, 62, . . .
The other signal line 9 is connected to the input end of the other OR circuit 101, 102, . . . .

The AND circuit 71 is connected to the output sides of the OR circuits 61 and 101, and the AND circuit 72 is connected to the output sides of the OR circuits 62 and 102.

A selection signal 5ELO1SELL is input from the processor 4 to the controller 3 and the temperature detection circuits 21 and 22.

Next, the breathing operation in this circuit will be explained. The temperature of each bubble memory device rlo, Bl, B2, B3 is detected by a temperature detector and inputted to a temperature detection circuit 21.22 through a terminal It, and when the bubble memory device is at a low temperature, the temperature signal LT is sent to the processor. 4 is output. Therefore, on the processor 4 side, for each bubble memory device BO,, Bl, B2, B3,
You can monitor whether a breheat is required. In addition, this embodiment has two temperature detection circuits 21 and 22, and for example, one of the temperature detection circuits 21 outputs an LT multiplied signal when the temperature falls outside the range of -5°C to +2°C. The other temperature detection circuit 22 is configured to output an LT times signal when the temperature is outside the range of =10°C to +5°C. Therefore, on the processor 4 side, it is possible to select whether to output the breathing signal when the temperature is -5°C or less, or to output the breathing signal when the temperature is -10'C or less.

The drive device selection signal CSE outputted from the controller 3 now passes through the device number selection circuits 11 and 12,
Each bubble memory device B0. A single bubble memory device is selected and driven by inputting to terminals cs of Bl, B2, and B3.

At this time, the bubble memory device select signal S E outputted from the controller 3 1. , OlS E L 1
The bubble memory device to be driven next is selected. That is, a selection signal is input from the output terminal 5 of the device number selection circuit 11 to the OR circuits 61, 62, .

On the other hand, when the other input terminal of the OR circuit 61, 62, . 9, +111 signal to H
to L to turn it on and start preheating operation.

Next, the operations of Pre-1-1 will be explained according to the timing chart shown in FIG. As shown in (a), if the half memory device BO #0 is currently being driven by one selector, as shown in (b), two select signal lines 5ELO2SELL are used to send the signal from the processor 4 to #0. 1
Bubble memory device B1 is selected and its temperature is detected. If the temperature of the bubble memory device Bl is a temperature that requires breheating, the temperature detection circuit 21
．． 22 outputs the LT multiplied signal shown in (C) and notifies the processor 4. As a result, the breathing signal PH shown in (d) is turned on and output to the bubble memory device 1 through the controller, and the breathing means starts to be driven.

As a result, the bubble memory device B1 is heated,
When the temperature reaches an upper limit, the temperature detection signal LT is turned off, and the breathing signal pH is also turned off.

In this way, the #l bubble memory device B1 is at an operable temperature due to the breathing, so when the bubble memory device B1 is selected, it is immediately accessed as shown in (e).

〔Effect of the invention〕

As described above, according to the present invention, the temperature status of the next device to be accessed is monitored, and if the temperature is low, the device is preheated, so the device can be accessed immediately, and no waiting time is required. . Also, Breheat is
Since the process is not performed for all devices at once, but only for the device to be accessed next, the power consumption for preheating is reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the basic principle of the breathing method of a magnetic bubble memory device according to the present invention, and FIG. 2 is a diagram illustrating a circuit for implementing the breathing method according to the present invention.
FIG. 3 is a timing chart showing the breathing operation in the same circuit. In the figure, BO, Bl, B2, B3 are bubble memory devices, To, TI, T2... are temperature sensors, 1
2, 21 and 22 indicate a device number selection circuit, 2, 21 and 22 a temperature detection circuit, 3 a controller, and 4 a processor, respectively. Patent applicant Yasufumi Fukushima, sub-agent of Fujitsu Co., Ltd., patent attorney

Claims (1)

[Claims] In a magnetic bubble memory device that controls a plurality of bubble memory devices, each bubble memory device (B0), (B1)... has a temperature detecting means (T0), (T1)... and a preheating device. In addition, when the conditions for a device other than a bubble memory device currently being driven are at least at a temperature that requires preheating, and that the device is the next device to be driven, A preheating method for a magnetic bubble memory device, characterized in that a preheating means is controlled to operate.