JPS5922284A - Method for controlling power supply of magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To prevent large delay of access even if the greater part of power consumption is cut off to save the power, by constituting two power supply systems and providing a control circuit with a means to control the on/off the power supply sequentially or simultaneously in each power supply system in accordance with the access from the external. CONSTITUTION:The 1st system of power supply is a group consisting of a HR driving circuit 21 supplying electric power through a cut-off circuit 25 controlled by a control circuit 20a, a function driving circuit 22, a detecting circuit 23 and a timing circuit 20b and the 2nd system is a group consisting of a control circuit 20a to which electric power is directly supplied from a power supply switch 24 and an on/off circuit 25. Power supplying method to a memory device is the same as the ordinary method. In the waiting state, the control circuit 20a actuates the circuit 25 to cut off power supply. Every access from the external, the control circuit 20a supplies power to each circuit in suspending by the circuit 25 and supplies power to all circuits in the same manner as the ordinary method.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention t + f + M bubble memory device + 1t (D East Section Control System (b) Background of the Technology Bubble memory elements have vertical pi and as Binary information 1. The presence or absence of magnetic bubbles obtained by applying a magnetic field.
0, the signal train generated by this magnetic bubble is shifted by applying a local gradient of a bias magnetic field, and is transmitted through a predetermined bubble transmission path. It is a large-capacity serial magnetic memory element.

(c) Prior Art and Problems The major minor loop method is a commonly used configuration in magnetic bubble memory devices. A magnetic bubble memory device consists of a magnetic bubble memory element and various circuits for driving and supporting the magnetic bubble memory element. In a magnetic bubble memory element, a magnetic field that rotates on a plane parallel to the magnetic bubble propagation plane drives a multi-phase coil and advances in a fixed direction every rotation, thereby creating a data propagation loop (hereinafter referred to as a "minor loop") or data writing. / Propagate the read loop (hereinafter referred to as the major loop). FIG. 2 shows a configuration diagram of the conventional magnetic bubble element in FIG. 1 and an embodiment of the present invention.

In Fig. 1, 1 and 1a are magnetic bubble generators, and 2 and 2a are magnetic bubble generators.
is the write major loop, 3 is the writer, 4, 4a are the minor loops, 5.5a is the read major loop, 6 is the magnetic bubble replicator, 7.7a is the detector, 11 is the write circuit connection terminal, 12 is the replication circuit connection Terminals 13 and 14 are a detection and reading circuit connection terminal and an erase circuit connection terminal, respectively. The magnetic bubbles generated by the generator 1 propagate on the write measuring lube 2, 2a, and when they align at each position of the writer (T) 3, a current is applied to the terminal 11 and the writer (T) 3 are opened all at once, the magnetic bubbles on the write major loops 2.2a are replaced with the old information on each minor loop 4.4a, and each mica loop 4,4aK is written. After that, minor loop 4゜4a
The upper magnetic bubble circulates according to the rotating magnetic field.

In addition, the magnetic bubbles on the liner loops 4 and 4a are connected to the replicator (B
) 6, a current is applied to the terminal 12, and the magnetic bubbles on the liner loops 4, 4a are read all at once and replicated in the measure loops 5, 5a. Read measure loop 5,5
The magnetic bubble replicated on the surface a reaches the detectors (D) 7, 7a and is enlarged, and the presence or absence of the bubble is converted into a 1.0 M signal by a detection reading element constituted by, for example, a magnetoresistive element. The magnetic bubbles are sent out from the read terminal 13. Any unnecessary magnetic bubbles can be erased by the perpendicular demagnetizing field applied to the loop by the erase signal ym element 14.

The magnetic bubble memory device further includes various circuits for driving a plurality of magnetic bubble memory elements 10 at different times, as shown in the block diagram of a conventional magnetic bubble memory device in FIG. In the figure, 10 is a magnetic bubble memory element, and 20 is a part of 1fIIJ.

20a is a control circuit, 20b is a timing circuit, 21 is a rotating magnetic field (HR) drive circuit, 22 is a function and drive circuit, 23 is a detection circuit, and 24 is a power switch. The control circuit 20a receives and decodes each control signal from the outside, and controls the waveform via the timing circuit 20a to each circuit described later, manages and synchronizes the position of the magnetic bubble on the minor loop 4.4a, and controls the magnetic bubble. Retains and reads position information of defective minor loops written in memory confectionery,
In addition to writing, invalidation processing regarding defect positions is performed.

The timing circuit 20b performs timing control according to a preset sequence according to control data from the control circuit 20a. The HR drive circuit is a circuit that drives, for example, a two-phase coil to generate an in-plane rotating magnetic field that advances the magnetic bubble in the magnetic bubble memory element. The function drive circuit 22 sends write, erase, and copy signals to the magnetic bubble memory element 10 in accordance with the timing signal from the timing circuit 20b to cause the magnetic bubble memory element 10 to perform each function. The detection circuit 23 amplifies and shapes the detection signal from the magnetic bubble memory element 10 to a logic level and sends it to the control circuit Wr 20 a. The power switch 24 opens and closes one or more power sources necessary for the above circuit operation. In the conventional air bubble memory device, when the power switch 24 is turned on, power is supplied to all the circuits and the device becomes operational. At this time, since the magnetic bubble memory device is a serial memory, as an initialization operation before performing a write/read operation, it is necessary to detect in which position in the order of the minor loop 4゜4a the data is to be written or placed. A magnetic bubble position management control function provided in the control circuit 20a detects a magnetic bubble of a minor lube for a marker indicating the 11ft position of the 0 address, for example, for normal cueing of data prepared and stored. Perform alignment. At the same time, information on the defective minor loop of the magnetic bubble memory element is read out and stored in the control circuit 20a.

After performing the above-mentioned initialization operation when the power is turned on, the magnetic bubble memory device becomes ready and remains in a standby state until an access control signal is received from the outside in response to a write T sale. When the control circuit 20a receives a control signal from the outside, the HR drive circuit 21. The timing circuit 20a sends out a control signal via timing circuit t820b to the function drive circuit 1'822 and the detection circuit 23, and the control circuit 20a manages the information position, writes and detects magnetic bubbles.

After erasing and dividing the minor loop defects, the operation is terminated and the process returns to a standby state.

In this case, in the standby state (the magnetic bubble memory element is
It is a nonvolatile memory that does not require a power supply, and unlike other IC memories, it does not require power to retain data, but as a magnetic bubble memory device, power is supplied to each peripheral circuit, so it consumes no power. ing. In this standby state, the -Lj@ source can be disconnected, but when access is received from the outside, the above-mentioned initialization operation is required before the intelligent read operation can be performed according to the control signal, resulting in a significant access delay. There were drawbacks.

(d) Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks by cutting off most of the power consumption in the standby state, thereby providing a means that does not significantly delay access even when energy is saved and power is saved. That is.

(e) Structure of the Invention The object of the present invention is to provide a magnetic bubble memory device comprising a single or parallel magnetic bubble memory element, peripheral circuits for driving the element, and a control circuit. drive circuit.

A function drive circuit, a magnetic bubble detection circuit, a timing circuit for the control section, one or more first power supply means required for each circuit, a control circuit for the remaining control section, and one or more first power supply means required for the control circuit. 2. A magnetic bubble memory comprising two power supply series of the second power supply means, and the control circuit is equipped with a means for controlling application and disconnection of the power supply in 11 days or simultaneously for each power supply series in a manner that is easy to access from the outside. This can be achieved by providing an r+j source control scheme for the device.

(f) Implementation of the Invention An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a block diagram of a power supply control system for a magnetic bubble memory device according to an embodiment of the present invention. In the figure, 10 is a magnetic bubble memory element, 20 is a control unit, 20
a is a control circuit, 20b is a timing circuit, 21 is an HR drive circuit, 22 is a function drive circuit, 23 is a detection circuit, 24 is a power switch, and 25 is an application/cutoff circuit.

In each reference numeral in the figure, constituent members having the same reference numerals as those in FIG. 2 have the same functions as those described above. As shown in FIG. 1, in the present invention, the power supply is divided into two systems, the first system being an application power supply that operates under the control of the control circuit 20a.
This is a group of I (R drive circuit 21, function drive circuit 22, detection circuit 23, and timing circuit 20b) that is supplied with power via a disconnection circuit, and the second series is directly supplied with power by opening and closing the power switch 24. This group includes the control circuit 20a and the cutting/applying circuit 25.The magnetic bubble memory device is turned on in the same way as in the conventional case, and power is supplied to all the circuits, and the control circuit 20a performs the initial operation. Thereafter, in the standby state, the control circuit 20a operates the application/cutoff circuit 25 to cut off the power supply.

Then, each time an access is made from the outside, the control circuit 20a applies the voltage Φ
The disconnection circuit 25 supplies power to each circuit that is inactive, and supplies power to all circuits to perform write and read operations as in the conventional case. In this way, the first
The power consumption of each circuit in the series is reduced to O, and when all circuits are powered on under the control of the control circuit 20a, the control circuit 20a retains the position information of the magnetic bubble and the defect information of the minor loop, and all functions are activated. Therefore, writing and reading operations can be performed in the same way as in the conventional case after power is supplied.

(g) As described in detail, according to the present invention, in addition to the feature that the magnetic bubble memory device requires unnecessary power for data retention when it is not in use, it also requires no external power while the device is in operation. This is useful because it provides a power control scheme that can reduce the power consumption of the circuit during standby without impairing write and read operations for accesses from.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional magnetic bubble memory device and an embodiment of the present invention, FIG. 2 is a block diagram of a conventional magnetic bubble memory device, and FIG. 3 is a block diagram of a magnetic bubble memory device according to an embodiment of the present invention. A block diagram of the power supply control system of the device is shown. In the figure, 10 is a magnetic bubble memory element. 20a is a control circuit, 20b is a timing circuit, 21 is a rotating magnetic field drive circuit, 22 is a funxion drive circuit, 23
, -24 is a power switch, and 25 is an application/cutoff circuit. 2'1 Figure

Claims (1)

[Claims] In a magnetic bubble memory device comprising a number or plurality of magnetic bubble memory elements, peripheral circuits for driving the elements, and a control circuit, a rotating magnetic field drive circuit for the magnetic bubble memory element 9. The power supply circuit for the Fupunkushi pin drive circuit, the magnetic puzzle detection circuit, the timing circuit for the control section, the number or plurality of first power supply means required for each circuit, the control circuit for the remaining control section, and the timing circuit for the control section. The second power supply means converges over the required number of threats, and the control circuit comprises means for sequentially or simultaneously controlling the application and disconnection of power for each power supply series according to external access. Features a ridge control method for magnetic bubble memory devices.